<?php
$string = “?This is a test that should be in single quotes quotes?”;
$text = preg_replace(”/(\?([^\?]+)\?)/”,”‘\\2′”,$string);
?>
$string = “?This is a test that should be in single quotes quotes?”;
$text = preg_replace(”/(\?([^\?]+)\?)/”,”‘\\2′”,$string);
?>
regular expression produces:
This is a test that should be in single quotes’