special-quote.php

<?php

$string = "This is a example with special “quotes” and ‘single quotes’";

echo $string . "\n";
echo fixcurly($string) . "\n";


function fixcurly($string)
{ 
    $search = array("\xe2\x80\x9c", "\xe2\x80\x9d", "\xe2\x80\x98", "\xe2\x80\x99");
    $replace = array('"', '"', "'", "'");
    return str_replace($search, $replace, $string);
}