kick ass strstr

strstrbi.php

<?php

function strstrbi($haystack, $needle, $before_needle=FALSE, $include_needle=TRUE, $case_sensitive=FALSE) {
 //Find the position of $needle
 if($case_sensitive) {
  $pos=strpos($haystack,$needle);
 } else {
  $pos=strpos(strtolower($haystack),strtolower($needle));
 }

 //If $needle not found, abort
 if($pos===FALSE) return FALSE;

 //Adjust $pos to include/exclude the needle
 if($before_needle==$include_needle) $pos+=strlen($needle);

 //get everything from 0 to $pos?
 if($before_needle) return substr($haystack,0,$pos);

 //otherwise, go from $pos to end
 return substr($haystack,$pos);
}

?>