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revision 46 by dashley,
Fri Oct 14 02:17:12 2016 UTC
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  <?php
  //--------------------------------------------------------------------------------
  //filenames_pics_canonize.php, v0.1a, Copyright David T. Ashley, 2016
  //--------------------------------------------------------------------------------
  //-------------------------------------------------------------------------------------------------
  //Copyright 2016 David T. Ashley
  //-------------------------------------------------------------------------------------------------
  //This source code and any program in which it is compiled/used is provided under the GNU GENERAL
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  //-------------------------------------------------------------------------------------------------
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  //  In the following three paragraphs, a "patent license" is any express
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  //(such as an express permission to practice a patent or covenant not to
  //sue for patent infringement).  To "grant" such a patent license to a
  //party means to make such an agreement or commitment not to enforce a
  //patent against the party.
  //
  //  If you convey a covered work, knowingly relying on a patent license,
  //and the Corresponding Source of the work is not available for anyone
  //to copy, free of charge and under the terms of this License, through a
  //publicly available network server or other readily accessible means,
  //then you must either (1) cause the Corresponding Source to be so
  //available, or (2) arrange to deprive yourself of the benefit of the
  //patent license for this particular work, or (3) arrange, in a manner
  //consistent with the requirements of this License, to extend the patent
  //license to downstream recipients.  "Knowingly relying" means you have
  //actual knowledge that, but for the patent license, your conveying the
  //covered work in a country, or your recipient's use of the covered work
  //in a country, would infringe one or more identifiable patents in that
  //country that you have reason to believe are valid.
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  //  If, pursuant to or in connection with a single transaction or
  //arrangement, you convey, or propagate by procuring conveyance of, a
  //covered work, and grant a patent license to some of the parties
  //receiving the covered work authorizing them to use, propagate, modify
  //or convey a specific copy of the covered work, then the patent license
  //you grant is automatically extended to all recipients of the covered
  //work and works based on it.
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  //  A patent license is "discriminatory" if it does not include within
  //the scope of its coverage, prohibits the exercise of, or is
  //conditioned on the non-exercise of one or more of the rights that are
  //specifically granted under this License.  You may not convey a covered
  //work if you are a party to an arrangement with a third party that is
  //in the business of distributing software, under which you make payment
  //to the third party based on the extent of your activity of conveying
  //the work, and under which the third party grants, to any of the
  //parties who would receive the covered work from you, a discriminatory
  //patent license (a) in connection with copies of the covered work
  //conveyed by you (or copies made from those copies), or (b) primarily
  //for and in connection with specific products or compilations that
  //contain the covered work, unless you entered into that arrangement,
  //or that patent license was granted, prior to 28 March 2007.
  //
  //  Nothing in this License shall be construed as excluding or limiting
  //any implied license or other defenses to infringement that may
  //otherwise be available to you under applicable patent law.
  //
  //  12. No Surrender of Others' Freedom.
  //
  //  If conditions are imposed on you (whether by court order, agreement or
  //otherwise) that contradict the conditions of this License, they do not
  //excuse you from the conditions of this License.  If you cannot convey a
  //covered work so as to satisfy simultaneously your obligations under this
  //License and any other pertinent obligations, then as a consequence you may
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  //to collect a royalty for further conveying from those to whom you convey
  //the Program, the only way you could satisfy both those terms and this
  //License would be to refrain entirely from conveying the Program.
  //
  //  13. Use with the GNU Affero General Public License.
  //
  //  Notwithstanding any other provision of this License, you have
  //permission to link or combine any covered work with a work licensed
  //under version 3 of the GNU Affero General Public License into a single
  //combined work, and to convey the resulting work.  The terms of this
  //License will continue to apply to the part which is the covered work,
  //but the special requirements of the GNU Affero General Public License,
  //section 13, concerning interaction through a network will apply to the
  //combination as such.
  //
  //  14. Revised Versions of this License.
  //
  //  The Free Software Foundation may publish revised and/or new versions of
  //the GNU General Public License from time to time.  Such new versions will
  //be similar in spirit to the present version, but may differ in detail to
  //address new problems or concerns.
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  //  Each version is given a distinguishing version number.  If the
  //Program specifies that a certain numbered version of the GNU General
  //Public License "or any later version" applies to it, you have the
  //option of following the terms and conditions either of that numbered
  //version or of any later version published by the Free Software
  //Foundation.  If the Program does not specify a version number of the
  //GNU General Public License, you may choose any version ever published
  //by the Free Software Foundation.
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  //  If the Program specifies that a proxy can decide which future
  //versions of the GNU General Public License can be used, that proxy's
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  //to choose that version for the Program.
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  //author or copyright holder as a result of your choosing to follow a
  //later version.
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  //  15. Disclaimer of Warranty.
  //
  //  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
  //APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
  //HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
  //OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
  //THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  //PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
  //IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
  //ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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  //  16. Limitation of Liability.
  //
  //  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
  //WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
  //THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
  //GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
  //USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
  //DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
  //PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
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  //SUCH DAMAGES.
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  //  17. Interpretation of Sections 15 and 16.
  //
  //  If the disclaimer of warranty and limitation of liability provided
  //above cannot be given local legal effect according to their terms,
  //reviewing courts shall apply local law that most closely approximates
  //an absolute waiver of all civil liability in connection with the
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  //copy of the Program in return for a fee.
  //
  //                     END OF TERMS AND CONDITIONS
  //
  //            How to Apply These Terms to Your New Programs
  //
  //  If you develop a new program, and you want it to be of the greatest
  //possible use to the public, the best way to achieve this is to make it
  //free software which everyone can redistribute and change under these terms.
  //
  //  To do so, attach the following notices to the program.  It is safest
  //to attach them to the start of each source file to most effectively
  //state the exclusion of warranty; and each file should have at least
  //the "copyright" line and a pointer to where the full notice is found.
  //
  //    <one line to give the program's name and a brief idea of what it does.>
  //    Copyright (C) <year>  <name of author>
  //
  //    This program is free software: you can redistribute it and/or modify
  //    it under the terms of the GNU General Public License as published by
  //    the Free Software Foundation, either version 3 of the License, or
  //    (at your option) any later version.
  //
  //    This program is distributed in the hope that it will be useful,
  //    but WITHOUT ANY WARRANTY; without even the implied warranty of
  //    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  //    GNU General Public License for more details.
  //
  //    You should have received a copy of the GNU General Public License
  //    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  //
  //Also add information on how to contact you by electronic and paper mail.
  //
  //  If the program does terminal interaction, make it output a short
  //notice like this when it starts in an interactive mode:
  //
  //    <program>  Copyright (C) <year>  <name of author>
  //    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
  //    This is free software, and you are welcome to redistribute it
  //    under certain conditions; type `show c' for details.
  //
  //The hypothetical commands `show w' and `show c' should show the appropriate
  //parts of the General Public License.  Of course, your program's commands
  //might be different; for a GUI interface, you would use an "about box".
  //
  //  You should also get your employer (if you work as a programmer) or school,
  //if any, to sign a "copyright disclaimer" for the program, if necessary.
  //For more information on this, and how to apply and follow the GNU GPL, see
  //<http://www.gnu.org/licenses/>.
  //
  //  The GNU General Public License does not permit incorporating your program
  //into proprietary programs.  If your program is a subroutine library, you
  //may consider it more useful to permit linking proprietary applications with
  //the library.  If this is what you want to do, use the GNU Lesser General
  //Public License instead of this License.  But first, please read
  //<http://www.gnu.org/philosophy/why-not-lgpl.html>.
  //-------------------------------------------------------------------------------------------------
  //This program, a PHP script, modifies all filenames in a directory to a canonical
  //form (no upper-case letters or unusual characters).  This program is part of a
  //3-program suite designed to collectively create a web page directly from
  //digital camera files (and of course the web page can be customized by
  //hand-editing after it is automatically generated).  The supported process for
  //creating a web page involves 3 programs (rather than 1) primarily to circumvent
  //the involuntary process termination that will occur in some shared environments
  //if a process consumes too much CPU time.
  //
  //The 3 programs in the 3-program suite are:
  //
  //   filenames_canonize.php (this program):
  //      Converts all names of files in a directory to lower-case, and makes
  //      substitutions for any unusual characters.
  //
  //   thumbnails_make.php:
  //      Creates thumbnails from recognized image types.  The thumbnails are
  //      named relative to the original image file with the suffix "_small".
  //      Only 20 files are converted on each invocation of the program, to
  //      avoid the involuntary process termination that typically occurs in
  //      a shared hosting environment when a process uses too much CPU time.
  //      The program should be run repeatedly until it indicates that it has
  //      no more thumbnails to create.
  //
  //      If any full-sized photos are modified, any corresponding thumbnails
  //      should be deleted and thumbnails_make.php and indexfile_make.php
  //      should be run again.
  //
  //   indexfile_make.php
  //      Scans a directory and makes an index file ("index2.php") displaying
  //      all the thumbnail images, each of which link to the corresponding
  //      full-sized image.  The index file is tailored to Dave Ashley's
  //      needs, but the created file can be edited and most of the content
  //      pasted into an HTML file.  To avoid the accidental loss of
  //      information, any existing "index2.php" file is renamed out of the
  //      way.
  //
  //This script is designed to be run manually (rather than automatically invoked
  //as a result of a web page request).  It was written in PHP for convenience
  //simply because DreamHost (the web hosting company Dave Ashley uses) has as part
  //of its hosting environment PHP with the ImageMagick library compiled in.
  //
  //Usually, this script is invoked using "php <path>/filenames_canonize.php", but
  //the method of invocation may vary based on computing platform details.
  //--------------------------------------------------------------------------------
  //This program is free software: you can redistribute it and/or modify
  //it under the terms of the GNU General Public License as published by
  //the Free Software Foundation, either version 3 of the License, or
  //(at your option) any later version.
  //
  //This program is distributed in the hope that it will be useful,
  //but WITHOUT ANY WARRANTY; without even the implied warranty of
  //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  //GNU General Public License for more details.
  //
  //The GNU General Public License is reproduced below, and also is
  //available at http://www.gnu.org/licenses/.
  //--------------------------------------------------------------------------------
  //                    GNU GENERAL PUBLIC LICENSE
  //                       Version 3, 29 June 2007
  //
  // Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  // Everyone is permitted to copy and distribute verbatim copies
  // of this license document, but changing it is not allowed.
  //
  //                            Preamble
  //
  //   The GNU General Public License is a free, copyleft license for
  // software and other kinds of works.
  //
  //   The licenses for most software and other practical works are designed
  // to take away your freedom to share and change the works.  By contrast,
  // the GNU General Public License is intended to guarantee your freedom to
  // share and change all versions of a program--to make sure it remains free
  // software for all its users.  We, the Free Software Foundation, use the
  // GNU General Public License for most of our software; it applies also to
  // any other work released this way by its authors.  You can apply it to
  // your programs, too.
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  //   When we speak of free software, we are referring to freedom, not
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  // stand ready to extend this provision to those domains in future versions
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  //   Finally, every program is threatened constantly by software patents.
  // States should not allow patents to restrict development and use of
  // software on general-purpose computers, but in those that do, we wish to
  // avoid the special danger that patents applied to a free program could
  // make it effectively proprietary.  To prevent this, the GPL assures that
  // patents cannot be used to render the program non-free.
  //
  //   The precise terms and conditions for copying, distribution and
  // modification follow.
  //
  //                       TERMS AND CONDITIONS
  //
  //   0. Definitions.
  //
  //   "This License" refers to version 3 of the GNU General Public License.
  //
  //   "Copyright" also means copyright-like laws that apply to other kinds of
  // works, such as semiconductor masks.
  //
  //   "The Program" refers to any copyrightable work licensed under this
  // License.  Each licensee is addressed as "you".  "Licensees" and
  // "recipients" may be individuals or organizations.
  //
  //   To "modify" a work means to copy from or adapt all or part of the work
  // in a fashion requiring copyright permission, other than the making of an
  // exact copy.  The resulting work is called a "modified version" of the
  // earlier work or a work "based on" the earlier work.
  //
  //   A "covered work" means either the unmodified Program or a work based
  // on the Program.
  //
  //   To "propagate" a work means to do anything with it that, without
  // permission, would make you directly or secondarily liable for
  // infringement under applicable copyright law, except executing it on a
  // computer or modifying a private copy.  Propagation includes copying,
  // distribution (with or without modification), making available to the
  // public, and in some countries other activities as well.
  //
  //   To "convey" a work means any kind of propagation that enables other
  // parties to make or receive copies.  Mere interaction with a user through
  // a computer network, with no transfer of a copy, is not conveying.
  //
  //   An interactive user interface displays "Appropriate Legal Notices"
  // to the extent that it includes a convenient and prominently visible
  // feature that (1) displays an appropriate copyright notice, and (2)
  // tells the user that there is no warranty for the work (except to the
  // extent that warranties are provided), that licensees may convey the
  // work under this License, and how to view a copy of this License.  If
  // the interface presents a list of user commands or options, such as a
  // menu, a prominent item in the list meets this criterion.
  //
  //   1. Source Code.
  //
  //   The "source code" for a work means the preferred form of the work
  // for making modifications to it.  "Object code" means any non-source
  // form of a work.
  //
  //   A "Standard Interface" means an interface that either is an official
  // standard defined by a recognized standards body, or, in the case of
  // interfaces specified for a particular programming language, one that
  // is widely used among developers working in that language.
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  //   The "System Libraries" of an executable work include anything, other
  // than the work as a whole, that (a) is included in the normal form of
  // packaging a Major Component, but which is not part of that Major
  // Component, and (b) serves only to enable use of the work with that
  // Major Component, or to implement a Standard Interface for which an
  // implementation is available to the public in source code form.  A
  // "Major Component", in this context, means a major essential component
  // (kernel, window system, and so on) of the specific operating system
  // (if any) on which the executable work runs, or a compiler used to
  // produce the work, or an object code interpreter used to run it.
  //
  //   The "Corresponding Source" for a work in object code form means all
  // the source code needed to generate, install, and (for an executable
  // work) run the object code and to modify the work, including scripts to
  // control those activities.  However, it does not include the work's
  // System Libraries, or general-purpose tools or generally available free
  // programs which are used unmodified in performing those activities but
  // which are not part of the work.  For example, Corresponding Source
  // includes interface definition files associated with source files for
  // the work, and the source code for shared libraries and dynamically
  // linked subprograms that the work is specifically designed to require,
  // such as by intimate data communication or control flow between those
  // subprograms and other parts of the work.
  //
  //   The Corresponding Source need not include anything that users
  // can regenerate automatically from other parts of the Corresponding
  // Source.
  //
  //   The Corresponding Source for a work in source code form is that
  // same work.
  //
  //   2. Basic Permissions.
  //
  //   All rights granted under this License are granted for the term of
  // copyright on the Program, and are irrevocable provided the stated
  // conditions are met.  This License explicitly affirms your unlimited
  // permission to run the unmodified Program.  The output from running a
  // covered work is covered by this License only if the output, given its
  // content, constitutes a covered work.  This License acknowledges your
  // rights of fair use or other equivalent, as provided by copyright law.
  //
  //   You may make, run and propagate covered works that you do not
  // convey, without conditions so long as your license otherwise remains
  // in force.  You may convey covered works to others for the sole purpose
  // of having them make modifications exclusively for you, or provide you
  // with facilities for running those works, provided that you comply with
  // the terms of this License in conveying all material for which you do
  // not control copyright.  Those thus making or running the covered works
  // for you must do so exclusively on your behalf, under your direction
  // and control, on terms that prohibit them from making any copies of
  // your copyrighted material outside their relationship with you.
  //
  //   Conveying under any other circumstances is permitted solely under
  // the conditions stated below.  Sublicensing is not allowed; section 10
  // makes it unnecessary.
  //
  //   3. Protecting Users' Legal Rights From Anti-Circumvention Law.
  //
  //   No covered work shall be deemed part of an effective technological
  // measure under any applicable law fulfilling obligations under article
  // 11 of the WIPO copyright treaty adopted on 20 December 1996, or
  // similar laws prohibiting or restricting circumvention of such
  // measures.
  //
  //   When you convey a covered work, you waive any legal power to forbid
  // circumvention of technological measures to the extent such circumvention
  // is effected by exercising rights under this License with respect to
  // the covered work, and you disclaim any intention to limit operation or
  // modification of the work as a means of enforcing, against the work's
  // users, your or third parties' legal rights to forbid circumvention of
  // technological measures.
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  //   4. Conveying Verbatim Copies.
  //
  //   You may convey verbatim copies of the Program's source code as you
  // receive it, in any medium, provided that you conspicuously and
  // appropriately publish on each copy an appropriate copyright notice;
  // keep intact all notices stating that this License and any
  // non-permissive terms added in accord with section 7 apply to the code;
  // keep intact all notices of the absence of any warranty; and give all
  // recipients a copy of this License along with the Program.
  //
  //   You may charge any price or no price for each copy that you convey,
  // and you may offer support or warranty protection for a fee.
  //
  //   5. Conveying Modified Source Versions.
  //
  //   You may convey a work based on the Program, or the modifications to
  // produce it from the Program, in the form of source code under the
  // terms of section 4, provided that you also meet all of these conditions:
  //
  //     a) The work must carry prominent notices stating that you modified
  //     it, and giving a relevant date.
  //
  //     b) The work must carry prominent notices stating that it is
  //     released under this License and any conditions added under section
  //     7.  This requirement modifies the requirement in section 4 to
  //     "keep intact all notices".
  //
  //     c) You must license the entire work, as a whole, under this
  //     License to anyone who comes into possession of a copy.  This
  //     License will therefore apply, along with any applicable section 7
  //     additional terms, to the whole of the work, and all its parts,
  //     regardless of how they are packaged.  This License gives no
  //     permission to license the work in any other way, but it does not
  //     invalidate such permission if you have separately received it.
  //
  //     d) If the work has interactive user interfaces, each must display
  //     Appropriate Legal Notices; however, if the Program has interactive
  //     interfaces that do not display Appropriate Legal Notices, your
  //     work need not make them do so.
  //
  //   A compilation of a covered work with other separate and independent
  // works, which are not by their nature extensions of the covered work,
  // and which are not combined with it such as to form a larger program,
  // in or on a volume of a storage or distribution medium, is called an
  // "aggregate" if the compilation and its resulting copyright are not
  // used to limit the access or legal rights of the compilation's users
  // beyond what the individual works permit.  Inclusion of a covered work
  // in an aggregate does not cause this License to apply to the other
  // parts of the aggregate.
  //
  //   6. Conveying Non-Source Forms.
  //
  //   You may convey a covered work in object code form under the terms
  // of sections 4 and 5, provided that you also convey the
  // machine-readable Corresponding Source under the terms of this License,
  // in one of these ways:
  //
  //     a) Convey the object code in, or embodied in, a physical product
  //     (including a physical distribution medium), accompanied by the
  //     Corresponding Source fixed on a durable physical medium
  //     customarily used for software interchange.
  //
  //     b) Convey the object code in, or embodied in, a physical product
  //     (including a physical distribution medium), accompanied by a
  //     written offer, valid for at least three years and valid for as
  //     long as you offer spare parts or customer support for that product
  //     model, to give anyone who possesses the object code either (1) a
  //     copy of the Corresponding Source for all the software in the
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  //--------------------------------------------------------------------------------
  //C O N F I G U R A T I O N
  //--------------------------------------------------------------------------------
  //Configuration switch combinations were not tested.  E-mail me any program
  //corrections (dashley@gmail.com).
  define ("CFG_PROGNAME", "filenames_canonize.php");
     //Number of characters per line preferred for console output.
  define ("CFG_CONSOLE_STD_LINE_LEN", 78);
     //Number of characters per line preferred for console output.
  define (
     "CFG_FILENAME_SUBSTITUTION_MAP",
     ".."                                                    //Dots unchanged.
     .
     "aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz"  //LC letters unchanged.
     .
     "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"  //UC converted to LC.
     .
     "00112233445566778899"                                  //Digits unchanged.
     .
     "-_"                                                    //Hyphens become underscores,
                                                             //and anything unmapped
                                                             //becomes an underscore.
     );
     //Pairs of characters, the first is the character to match and the second
     //is the replacement.  Any characters not found in the map will be replaced
     //by the last character of the constant.
  //--------------------------------------------------------------------------------
  //Repeats a character to the console output a certain number of times.
  function rep_char_con($c, $n)
  {
     while ($n--)
        echo $c;
  }
  //--------------------------------------------------------------------------------
  //Writes a standard thick horizontal line to the console.
  function hor_line_thick()
  {
     rep_char_con("=", CFG_CONSOLE_STD_LINE_LEN);
     echo "\n";
  }
  //--------------------------------------------------------------------------------
  //Writes a standard thin horizontal line to the console.
  function hor_line_thin()
  {
     rep_char_con("-", CFG_CONSOLE_STD_LINE_LEN);
     echo "\n";
  }
  //--------------------------------------------------------------------------------
  //Returns an array of all files in the working directory.
  //If no files can be found, returns FALSE.
  function get_file_names_in_dir()
  {
     //Get directory list.
     $rv = scandir (".");
     //If the list is empty, something went wrong.  Return FALSE.
     if ($rv === FALSE)
        return FALSE;
     return $rv;
  }
  //--------------------------------------------------------------------------------
  //Canonizes a filename by performing character substitutions.
  function canonize($in_fname)
  {
     //Well, the algorithm below is O(N^2) or worse ... I knew there was a reason
     //that computers get faster every year.
     $out_fname = "";
     for ($i = 0; $i < strlen($in_fname); $i++)
     {
        $map = CFG_FILENAME_SUBSTITUTION_MAP;
        $c = substr($in_fname, $i, 1);
        $sub_made = FALSE;
        while (strlen($map) >= 2)
        {
           if (substr($map, 0, 1) == $c)
           {
              $c = substr($map, 1, 1);
              $sub_made = TRUE;
              break;
           }
           else
           {
              $map = substr($map, 2);
           }
        }
        if (! $sub_made)
        {
           $c = substr(CFG_FILENAME_SUBSTITUTION_MAP, strlen(CFG_FILENAME_SUBSTITUTION_MAP) - 1, 1);
           //echo "Default sub made: " . $c . "\n";
        }
        $out_fname = $out_fname . $c;
     }
     return $out_fname;
  }
  //--------------------------------------------------------------------------------
     //Write introductory message.
     hor_line_thick();
     echo CFG_PROGNAME . " Copyright (C) 2015 David T. Ashley\n";
     echo "This program comes with ABSOLUTELY NO WARRANTY; and is licensed under\n";
     echo "the GNU General Public License, Version 3.  A copy of this license is\n";
     echo "provided in the source code of this program.\n";
     hor_line_thin();
     //-----------------------------------------------------------------------------
     //Get and emit the names of everything in the directory.
     $file_list = get_file_names_in_dir();
     if ($file_list === FALSE)
     {
        echo "List of files from PHP function scandir() is empty.\n";
        echo "Serious internal error, or nothing to do.  Script cannot continue.\n";
        hor_line_thick();
        exit(1);
     }
     else
     {
       echo "Files in working directory (unsorted, unfiltered, "
            .
            count($file_list)
            .
            " files):\n";
       for ($i = 0; $i < count($file_list); $i++)
          echo "   " . sprintf("[%5d]", $i) . " " . $file_list[$i] . "\n";
     }
     hor_line_thin();
     //-----------------------------------------------------------------------------
     //Remove everything that is not a file we can rename.
     $temp_list = $file_list;
     unset($file_list);
     $n = 0;
     for ($i = 0; $i < count($temp_list); $i++)
     {
        //echo "Checking " . $temp_list[$i] . "\n";
        if (strcmp($temp_list[$i], ".") == 0)
        {
           //. entry, not a file.
        }
        else if (strcmp($temp_list[$i], "..") == 0)
        {
           //.. entry, not a file.
        }
        else if (is_file($temp_list[$i]))
        {
           //This is a regular file.
           $file_list[] = $temp_list[$i];
           $n++;
        }
     }
     if ($n == 0)
        $file_list = FALSE;
     unset($n);
     unset($temp_list);
     //-----------------------------------------------------------------------------
     //If there is nothing to do, end the script.
     if ($file_list === FALSE)
     {
        echo "No files to rename.\n";
        hor_line_thick();
        exit(0);
     }
     //-----------------------------------------------------------------------------
     //Sort the list.  This is a non-event.  The only rationale for sorting is that
     //it ensures that the same set of files will be processed in the same order,
     //regardless of the order provided by the underlying OS internals.
     sort($file_list);
     //-----------------------------------------------------------------------------
     //Emit the names we now have.
     echo "Files in working directory (directory entries removed, sorted, "
          .
          count($file_list)
          .
          " files):\n";
     for ($i = 0; $i < count($file_list); $i++)
        echo "   " . sprintf("[%5d]", $i) . " " . $file_list[$i] . "\n";
     hor_line_thin();
     //-----------------------------------------------------------------------------
     //For each file in the directory, form a filename which would be the result
     //of applying character substitutions and any other corrections.
     for ($i = 0; $i < count($file_list); $i++)
     {
        $rename_target[$i] = canonize($file_list[$i]);
        //echo $file_list[$i] . " " . $rename_target[$i] . "\n";
     }
     //-----------------------------------------------------------------------------
     //In all those cases where the name of the file as we would like it to be is
     //different from the name of the file as it exists, rename it.  Watch for
     //collisions, because renaming on top of a file represents the loss of
     //data.
     $n = 0;
     for ($i = 0; $i < count($file_list); $i++)
     {
        if (strcmp($file_list[$i], $rename_target[$i]) != 0)
           $n++;
     }
     if ($n == 0)
     {
        echo "No files need to be renamed.\n";
        hor_line_thin();
     }
     else
     {
        echo "Renaming " . $n . " file(s).\n";
        hor_line_thin();
        $count = 0;
        for ($i = 0; $i < count($file_list); $i++)
        {
           if (strcmp($file_list[$i], $rename_target[$i]) != 0)
           {
              $count++;
              echo "[" . sprintf("%5d/%5d", $count, $n) . "]"
                   .
                   " Renaming " . $file_list[$i] . " to " . $rename_target[$i] . " ... ";
              if (file_exists($rename_target[$i]))
              {
                 echo "Aborted.\nRename target already exists.\n";
                 echo "Choose non-colliding filenames and run this script again.\n";
                 echo "Script terminating.\n";
                 hor_line_thin();
                 exit(1);
              }
              $result = rename($file_list[$i], $rename_target[$i]);
              if ($result)
              {
                 echo "Done.\n";
                 hor_line_thin();
              }
              else
              {
                 echo "Failed.\nScript must terminate.\n";
                 hor_line_thick();
                 exit(1);
              }
           }
        }
     }
     //-----------------------------------------------------------------------------
     echo CFG_PROGNAME . " execution ends.\n";
     hor_line_thick();
  //--------------------------------------------------------------------------------
  //End of File
  //--------------------------------------------------------------------------------
  ?>

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changed lines


 
Added in v.46
-Removed from v.33
+Added in v.46

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