PHP_CompatInfo : The Definitive Guide

Rather than parsing file after file of an application, you may give the root of your application path as the main directory to parse. Default is recursive parsing: that mean each directory children will be also parsed. And only files with extension php, php4, inc, phtml will be proceed.

Suppose we have to detect which PHP version we need to run the PEAR::File_Find package release 1.3.0

First begin to download the archive from http://pear.php.net/package/File_Find/download/1.3.0 and extract the full contents to a temporary directory (in our example its '/tmp')

We will use this very simple detection script.

Results displayed:

array (
  'ignored_files' =>
  array (
    0 => '/tmp/File_Find-1.3.0/package.xml',
    1 => '/tmp/File_Find-1.3.0/tests/01glob.phpt',
    2 => '/tmp/File_Find-1.3.0/tests/02maptree.phpt',
    3 => '/tmp/File_Find-1.3.0/tests/03maptreemultiple.phpt',
    4 => '/tmp/File_Find-1.3.0/tests/04search.phpt',
    5 => '/tmp/File_Find-1.3.0/tests/05search_inside.phpt',
    6 => '/tmp/File_Find-1.3.0/tests/06match_shell.phpt',
    7 => '/tmp/File_Find-1.3.0/tests/bug2773.phpt',
  ),
  'ignored_functions' =>
  array (
  ),
  'ignored_extensions' =>
  array (
  ),
  'ignored_constants' =>
  array (
  ),
  'max_version' => '',
  'version' => '4.3.0',
  'extensions' =>
  array (
    0 => 'pcre',
  ),
  'constants' =>
  array (
    0 => '__FILE__',
  ),
  'tokens' =>
  array (
  ),
  'cond_code' =>
  array (
    0 => 4,
  ),
  '/tmp/File_Find-1.3.0/Find.php' =>
  array (
    'ignored_functions' =>
    array (
    ),
    'ignored_extensions' =>
    array (
    ),
    'ignored_constants' =>
    array (
    ),
    'max_version' => '',
    'version' => '4.3.0',
    'extensions' =>
    array (
      0 => 'pcre',
    ),
    'constants' =>
    array (
    ),
    'tokens' =>
    array (
    ),
    'cond_code' =>
    array (
      0 => 4,
    ),
  ),
  '/tmp/File_Find-1.3.0/tests/setup.php' =>
  array (
    'ignored_functions' =>
    array (
    ),
    'ignored_extensions' =>
    array (
    ),
    'ignored_constants' =>
    array (
    ),
    'max_version' => '',
    'version' => '4.0.0',
    'extensions' =>
    array (
    ),
    'constants' =>
    array (
      0 => '__FILE__',
    ),
    'tokens' =>
    array (
    ),
    'cond_code' =>
    array (
      0 => 0,
    ),
  ),
)
    

means that package PEAR::File_Find 1.3.0 need at least PHP 4.3.0 with extension pcre.

And you will see in displayed results, something like :

  'cond_code' =>
  array (
    0 => 4,
    1 =>
    array (
      0 =>
      array (
      ),
      1 =>
      array (
      ),
      2 =>
      array (
        0 => 'FILE_FIND_DEBUG',
      ),
    ),
    

cond_code offset 1 is an array available only when debug mode is set to true. In this array :