From a04f38c2625deb7e26a52147c6e8fd45581cffe2 Mon Sep 17 00:00:00 2001
From: Tobsn <orterer@gmail.com>
Date: Wed, 27 Jun 2012 03:46:31 -0700
Subject: [PATCH] Now with Balanced Parentheses!
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it's not regex, its not posix, but it can fly… finally balanced
parentheses to fix all the () issue. it's ugly but it's fast and works
with all kinds of combinations.

it basically just counts open vs. closed and if they are even again it
knows exactly where the condition is and does not cut into html or cut
off too much.
---
 laravel/blade.php | 39 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 3 deletions(-)

diff --git a/laravel/blade.php b/laravel/blade.php
index 7e4e2fdb..f224614a 100644
--- a/laravel/blade.php
+++ b/laravel/blade.php
@@ -260,9 +260,42 @@ protected static function compile_endforelse($value)
 	 */
 	protected static function compile_structure_openings($value)
 	{
-		$pattern = '/@(if|elseif|foreach|for|while)\s*?(\(.+?\))/';
-
-		return preg_replace($pattern, '<?php $1$2: ?>', $value);
+		preg_replace_callback(
+			'/@(if|elseif|foreach|for|while)(\s*?)(\([^\n\r\t]+\))/',
+			function($matches) use (&$value)
+			{
+				if(count( $matches ) === 4)
+				{
+					$open  = 0;
+					$close = 0;
+					$cut   = 0;
+					$len   = strlen($matches[3]);
+					for($i = 0; $i < $len; $i++)
+					{
+						if($matches[3][$i] === '(' )
+						{
+							$open++;
+						}
+						if($matches[3][$i] === ')' )
+						{
+							$close++;
+						}
+						if($open !== 0 && ($open === $close))
+						{
+							break;
+						}
+					}
+					$condition = substr($matches[3], 0, ($i + 1));
+					$value = str_replace(
+						'@'.$matches[1].$matches[2].$condition,
+						'<?php '.$matches[1].$condition.': ?>',
+						$value
+					);
+				}
+			},
+			$value
+		);
+		return $value;
 	}
 
 	/**