Closure causes syntax error in php-5.2

I am executing following code from this post:

preg_match_all("/'(.+)' ((\w+)\(? ?(\d*) ?\)?)/", $sql, $_matches, PREG_SET_ORDER);
$matches = array_map(function($v) {return array(trim($v[2]), $v[1]);}, $_matches);

But I am getting following error:

Parse error: syntax error, unexpected T_FUNC开发者_如何学GoTION, expecting ')' in SqlParser.php on line 29

I have spent some time to solve this but I am unable to find the solution.

Can someone tell me that what is wrong ?

I'm assuming you are using a PHP version less than 5.3, which does not support closures (You confirmed this in your comments). The code below should work. I just converted the anonymous function to a normal function.

function map_cb($v){
    return array(trim($v[2]), $v[1]);
}


preg_match_all("/'(.+)' ((\w+)\(? ?(\d*) ?\)?)/", $sql, $_matches, PREG_SET_ORDER);
$matches = array_map("map_cb", $_matches);

Unless you're using php 5.3, you can't use an anonymous function like that. According to the php documentation for callbacks,

As of PHP 5.3.0 it is possible to also pass a closure to a callback parameter.

You can use create_function() instead to create anon. functions, and that will work pre-PHP 5.3. Or use GWW's answer, that should work too.

Otherwise, if you're interested in learning more about anon. functions in PHP 5.3+, you can read their php docs.