public static function commandIsAvailable($command)
    {
        static $cache = array();
        if (!isset($cache[$command])) {
            $cache[$command] = false;
            $safeMode = @ini_get('safe_mode');
            if (empty($safeMode)) {
                if (function_exists('exec')) {
                    if (!in_array('exec', array_map('trim', explode(',', strtolower(@ini_get('disable_functions')))), true)) {
                        $rc = 1;
                        $output = array();
                        @exec($command.' --version 2>&1', $output, $rc);
                        if ($rc === 0) {
                            $cache[$command] = true;
                        }
                    }
                }
            }
        }

        return $cache[$command];
    }
public static function commandIsAvailable($command)
    {
        static $cache = array();
        if (!isset($cache[$command])) {
            $cache[$command] = false;
            $safeMode = @ini_get('safe_mode');
            if (empty($safeMode)) {
                if (function_exists('exec')) {
                    if (!in_array('exec', array_map('trim', explode(',', strtolower(@ini_get('disable_functions')))), true)) {
                        $rc = 1;
                        $output = array();
                        @exec($command.' --version 2>&1', $output, $rc);
                        if ($rc === 0) {
                            $cache[$command] = true;
                        }
                    }
                }
            }
        }

        return $cache[$command];
    }
public static function commandIsAvailable ( $ command ) { static $ cache = array ( ) ; if ( ! isset ( $ cache [ $ command ] ) ) { $ cache [ $ command ] = false ; $ safeMode = @ ini_get ( 'safe_mode' ) ; if ( empty ( $ safeMode ) ) { if ( function_exists ( 'exec' ) ) { if ( ! in_array ( 'exec' , array_map ( 'trim' , explode ( ',' , strtolower ( @ ini_get ( 'disable_functions' ) ) ) ) , true ) ) { $ rc = 1 ; $ output = array ( ) ; @ exec ( $ command . ' --version 2>&1' , $ output , $ rc ) ; if ( $ rc === 0 ) { $ cache [ $ command ] = true ; } } } } } return $ cache [ $ command ] ; }
Checks if a gettext command is available.

@param string $command One of the gettext commands

@return bool
Checks if a gettext command is available .