Error trying to pass regex match to function

Question

I\'m getting Syntax error, unexpected T_LNUMBER, expecting T_VARIABLE or \'$\'

This is the code i\'m using

function wpse44503_filter_con         


        

Answer 1

What you're trying to do (ie replacing the matched string with the result of a function call) can't be done using preg_replace, you'll need to use preg_replace_callback instead to get a function called for every match.

A short example of preg_replace_callback;

$get_site_url =                    // Returns replacement
  function($row) { 
    return '!'.$row[1].'!';        // row[1] is first "backref"
  };                                                     

$str = 'olle';
$regex = '/(ll)/';                 // String to match

$output = preg_replace_callback(   // Match, calling get_site_url for replacement
    $regex,
    $get_site_url,
    $str);

var_dump($output);                 // output "o!ll!e"