After upgrading to PHP 5.3.15, a PHP link directory search function was no longer working: Sorry, no records found that match your keyword(s).

A quick fix is to go into search.php and replace:

$pattern = array ( ‘/(AND[\s])+/’, ‘/(OR[\s])+/’, ‘/\s+/’, ‘/`+/’, ‘`^[^\w\d]`’, ‘`[^`\w\d]$`’ );

with

$pattern = array ( ‘#(AND[\s])+#i’, ‘#(OR[\s])+#i’, ‘#[\s]+#’, ‘#[`]+#’, ‘#^[^\w\d]#i’, ‘#[^`\w\d]$#i’ );