Parsing a simple file and display dump results

Overview

This example show how to parse a single file and detect php minimum version and extensions needed to run it.

Dependencies

This example requires mandatory resources :

PHP >= 4.3.10
PEAR >= 1.5.4
PEAR::PHP_CompatInfo >= 1.8.0
PEAR::File_Find >= 1.3.0
PEAR::Event_Dispatcher >= 1.0.0
tokenizer extension

Source Code

math.php : the source file php code to parse

<?php
$nb = bcsub(1.234, 5, 4);
if (preg_match('/^-/', $nb)) {
    echo 'minus';
}
?>

The very basic script to parse the file

<?php
require_once 'PHP/CompatInfo.php';
 
$dataSource = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'math.php';
 
$info = new PHP_CompatInfo();
$info->parseFile($dataSource);
// you may also use unified method: $info->parseData($dataSource);
?>

Output

array (
  'ignored_files' =>
  array (
  ),
  'ignored_functions' =>
  array (
  ),
  'ignored_extensions' =>
  array (
  ),
  'ignored_constants' =>
  array (
  ),
  'max_version' => '',
  'version' => '4.0.0',
  'extensions' =>
  array (
    0 => 'bcmath',
    1 => 'pcre',
  ),
  'constants' =>
  array (
  ),
  'tokens' =>
  array (
  ),
  'cond_code' =>
  array (
    0 => 0,
  ),
)

Explains step by step

At line 6, we created a basic instance of PHP_CompatInfo without parameters. That means, we used the default Array renderer (see Output). Results are always displayed on Standard Output unless you use the Null Renderer.

Offset 0 of cond_code in results, tell us that PHP_CompatInfo has not found any conditional code (=0). So be sure that the result of version and extensions are TRUE