installer.php

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<?php
 
require_once(CH_DIRECTORY_PATH_CLASSES . "ChWsbInstaller.php");
 
class ChFaceBookConnectInstaller extends ChWsbInstaller
{
    function __construct(&$aConfig)
    {
        parent::__construct($aConfig);
 
        $this->_aActions['check_requirements'] = array(
            'title' => 'Check requirements:',
        );
    }
 
    function actionCheckRequirements()
    {
        $bError = version_compare(PHP_VERSION, '5.4.0') >= 0
            ? CH_WSB_INSTALLER_SUCCESS
            : CH_WSB_INSTALLER_FAILED;
 
        return $bError;
    }
 
    function actionCheckRequirementsFailed()
    {
        return '
            <div style="border:1px solid red; padding:10px;">
                <u>PHP 5.4</u> or higher is required!
            </div>';
    }
}