<?php
function recur_trim($string){
$trim = array( '\n', '\r', ' ', '\t', '\0', '\x0B' );
$string = trim($string);
if(in_array(substr($string, 0, 1), $trim) || in_array(substr($string, -1))){
return recur_trim($string);
}
else{
return $string;
}
}
echo recur_trim('Test');
?>