PHP mode: False syntax error

[Cyphis]

The editor returns a false syntax error when a certain case statement is used with a switch statement. "Syntax error, unexpected T_STRING, expecting T_CASE or T_DEFAULT or '}'"

Example:

<?php
session_start();
ini_set('display_errors', -1);

if(!isset($_SESSION['secure_token'], $_POST['action'], $_POST['token']))
    die(json_encode(array("error" => "missing vars")));

require("functions.php");

if($_POST['token'] != $_SESSION['secure_token']) {
    add_error("CSRF", $_SERVER['SCRIPT_NAME']);
    $_SESSION['secure_token'] = create_secure_token();
    die(json_encode(array("error" => "invalid session")));
}

switch($_POST['action']) {

    // Syntax error occurs on the line below - it is valid syntax normally used for comparisons
    case("open_editor"):

    // rest of code irrelevant

}
?>

[nightwing]

Ace uses https://github.com/niklasvh/php.js/ for parsing php, but sadly php.js doesn't handle some of less used syntax constructs.

[danyaPostfactum]

This is because of incorrect regex: https://github.com/niklasvh/php.js/blob/master/src/parser/lexer.js#L173

In general, lexer should be completely rewritten. May be lexer generator should be used.