php参数过滤

//参数过滤

$sVariablesOrder = ini_get( 'variables_order' );

$request = array();

//过滤不安全数据

for ( $i = 0; $i < strlen( $sVariablesOrder ); $i++ ){

    $cVariableFlat = strtolower( $sVariablesOrder[$i] );

    switch ( $cVariableFlat ){

        case 'e':

            $filtered = filter_input_array ( INPUT_ENV, FILTER_SANITIZE_SPECIAL_CHARS );

            break;

        case 'g':

            $filtered = filter_input_array ( INPUT_GET, FILTER_SANITIZE_SPECIAL_CHARS );

            break;

        case 'p':

            $filtered = filter_input_array ( INPUT_POST, FILTER_SANITIZE_SPECIAL_CHARS );

            break;

        case 'c':

            $filtered = filter_input_array ( INPUT_COOKIE, FILTER_SANITIZE_SPECIAL_CHARS );

            break;

        case 's':           

            $filtered = filter_input_array ( INPUT_SERVER, FILTER_SANITIZE_SPECIAL_CHARS );

            break;

    }

        if ( !empty( $filtered ) ){

        $request = array_merge( $request, $filtered );

    }

}