preg_match_all正则表达式问题

Question

I am using preg_match_all, trying to match :

[<? or <?php]
[any amount of space here, at least one, may be newline]
[legendcool]
[any amount of space]
[(] return whatever is in here [)]
[any amount of space]
[?>]

I have this so far:

index.php

$the_prophecy = file_get_contents("secret.php");
preg_match_all('~[<?|<?php]\s*[legendcool(](.*?)[)]\s*[?>]~',$the_prophecy,$matches) ;

secret.php

<title>Regex Match all characters between two strings - Stack Overflow</title>
<link rel="shortcut icon" href="http://cdn.sstatic.net/stackoverflow/img/favicon.ico">
<?php          legendcool({'',''})       ?>
<link rel="apple-touch-icon image_src" href="http://cdn.sstatic.net/stackoverflow/img/

For example, in secret.php, I would want to get {'',''}

Do any of you guys know how I can adjust my preg_match_all to work in the way I want?

Answer 1

Couple of mistakes in your regex:

1. Square brackets should be replaced with round ones
2. ? should be escaped since its a special meaning in regular expressions
3. flag s (DOTALL) needs to be used if you want to match new lines as well

A better regex can be like this:

~<\?(?:php)?(.+?)\?>~s

Using above suggestions your final solution would be:

preg_match_all('~<\?(?:php)?\s+legendcool\(([^)]+)\).*?\?>~s', $the_prophecy, $matches);
print_r($matches[1]);
// OUTPUT:  {'',''}