<?php
class moduleCheck {

  public $Modules;
  
  //function parseModules() {
  function __construct() {
   ob_start(); // Stop output of the code and hold in buffer
   phpinfo(INFO_MODULES); // get loaded modules and their respective settings.
   $data = ob_get_contents(); // Get the buffer contents and store in $data variable
   ob_end_clean(); // Clear buffer
  
   $data = strip_tags($data,'<h2><th><td>'); // Keep only the items in the <h2>,<th> and <td> tags
   
   // Use regular expressions to filter out needed data
   // Replace everything in the <th> tags and put in <info> tags
   $data = preg_replace('/<th[^>]*>([^<]+)<\/th>/',"<info>\\1</info>",$data);
   
   // Replace everything in <td> tags and put in <info> tags
   $data = preg_replace('/<td[^>]*>([^<]+)<\/td>/',"<info>\\1</info>",$data);
   
   // Split the data into an array
   $vTmp = preg_split('/(<h2>[^<]+<\/h2>)/',$data,-1,PREG_SPLIT_DELIM_CAPTURE);
   $vModules = array();
   $count = count($vTmp);
   for ($i=1;$i<$count; $i+=2) { // Loop through array and add 2 instead of 1
   
    if (preg_match('/<h2>([^<]+)<\/h2>/',$vTmp[$i],$vMat)) { // Check to make sure value is a module
    
     $moduleName = trim($vMat[1]); // Get the module name 
     $vTmp2 = explode("\n",$vTmp[$i+1]);
     foreach ($vTmp2 AS $vOne) {
       $vPat = '<info>([^<]+)<\/info>'; // Specify the pattern we created above
       $vPat3 = "/$vPat\s*$vPat\s*$vPat/"; // Pattern for 2 settings (Local and Master values)
       $vPat2 = "/$vPat\s*$vPat/"; // Pattern for 1 settings
       if (preg_match($vPat3,$vOne,$vMat)) { // This setting has a Local and Master value
         $vModules[$moduleName][trim($vMat[1])] = array(trim($vMat[2]),trim($vMat[3]));
       } elseif (preg_match($vPat2,$vOne,$vMat)) { // This setting only has a value
         $vModules[$moduleName][trim($vMat[1])] = trim($vMat[2]);
       }
     }
     
    }
   }
   $this->Modules = $vModules; // Store modules in Modules variable
  }
  
  // Quick check if module is loaded
  // Returns true if loaded, false if not
  public function isLoaded($moduleName) {
    if($this->Modules[$moduleName]) { 
      return true;
    }
    return false;
  } // End function isLoaded
  
  // Get a module setting
  // Can be a single setting by specifying $setting value or all settings by not specifying $setting value
  public function getModuleSetting($moduleName, $setting = '') {
    // check if module is loaded before continuing
    if($this->isLoaded($moduleName)==false) {
      return 'Module not loaded'; // Module not loaded so return error
    }
    
    if($this->Modules[$moduleName][$setting]) { // You requested an individual setting
      return $this->Modules[$moduleName][$setting];
    } elseif(empty($setting)) { // List all settings
      return $this->Modules[$moduleName];
    }
    // If setting specified and no value found return error
    return 'Setting not found';
  } // End function getModuleSetting
  
  // List all php modules installed with no settings
  public function listModules() {
    foreach($this->Modules as $moduleName=>$values) { // Loop through modules
      // $moduleName is the key of $this->Modules, which is also module name
      $onlyModules[] = $moduleName;
    }
    return $onlyModules; // Return array of all module names
  } // End function listModules();
}
?>

<?php
require('class.phpextensions.php');
$modules = new moduleCheck(); // Start the moduleCheck class
echo '<pre>';
print_r($modules->listModules()); // List all installed modules
echo '</pre>';
?>

Array
(
    [0] => bcmath
    [1] => calendar
    [2] => com_dotnet
    [3] => ctype
    [4] => curl
    [5] => date
    [6] => dom
    [7] => filter
    [8] => ftp
    [9] => hash
    [10] => iconv
    [11] => ISAPI
    [12] => json
    [13] => ldap
    [14] => libxml
    [15] => mssql
    [16] => mysql
    [17] => odbc
    [18] => pcre
    [19] => Reflection
    [20] => session
    [21] => SimpleXML
    [22] => SPL
    [23] => standard
    [24] => tokenizer
    [25] => wddx
    [26] => xml
    [27] => xmlreader
    [28] => xmlwriter
    [29] => zlib
)

<?php
require('class.phpextensions.php');
$modules = new moduleCheck();
if($modules->isLoaded('curl')) { // Test if curl is loaded
  echo 'Curl Loaded<br />';
  echo $modules->getModuleSetting('curl', 'cURL Information'); // Get specific information about a setting in curl
} else {
  echo 'Curl not loaded';
}
?>

Curl Loaded
libcurl/7.14.0 OpenSSL/0.9.8d zlib/1.2.3

<?php
require('class.phpextensions.php');
$modules = new moduleCheck();
echo '<pre>';
print_r($modules->getModuleSetting('curl'));
echo '</pre>';
?>

Array
(
    [cURL support] => enabled
    [cURL Information] => libcurl/7.14.0 OpenSSL/0.9.8d zlib/1.2.3
)