REGEX replace line for forum threads

I am trying to replace text from an outdated mod on a forum. The old code looked like this

[ame="http://www.youtube.com/watch?v=wYJ20INbM7Q"]YouTube - ‪Bill O'Reilly Interviews Rapper Lupe Fiasco - 06/20/11‬‏[/ame]

I want the new code to look like this:

[video=youtube;wYJ20INbM7Q]http://www.youtube.com/watch?v=wYJ20INbM7Q[/video]YouTube - Bill O'Reilly Interviews Rapper Lupe 开发者_运维技巧Fiasco - 06/20/11[/video]

I used:

$text = preg_replace('[ame="http://www.youtube.com/watch?v="([a-z0-9]+)\"],
([video=youtube;$2]http://www.youtube.com/watch?v=$2[/video])', $text);

Error: Warning: Wrong parameter count for preg_replace()

Any help appreciated.

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Also, your code won't do what you want it to. Use these instead.

$regEx = '#\[ame\=".*?\=([a-zA-Z0-9]*?)"]#';
$replacement = "([video=youtube;$1]http://www.youtube.com/watch?v=$1[/video])";
$text = preg_replace($regEx, $replacement, $text);

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You are missing quotes before and after the first comma in your parameter list

$text = preg_replace('|\[ame="http://www.youtube.com/watch\?v=([a-z0-9]+)"\]|i', '[video=youtube;$1]http://www.youtube.com/watch?v=$1[/video]', $text);

Also, your regex has a number of syntax errors:

1. You need to identify the start and end of your pattern (I used | above)
2. You need to escape your square brackets
3. You don't need to escape your quote, and you have an extra quote after v=
4. You need an i modifier to make your match case-insensitive