<?php
/**
 * Find the position of the first occurrence of one or more substrings in a 
 * string.
 * 
 * This function is simulair to function strpos() except that it allows to 
 * search for multiple needles at once.
 *
 * @param string $haystack The string to search in.
 * @param mixed $needles Array containing needles or string containing 
 * needle.
 * @param integer $offset If specified, search will start this number of 
 * characters counted from the beginning of the 
 * string.
 * @param boolean $last If TRUE then the farthest position from the start 
 * of one of the needles is returned.
 * If FALSE then the smallest position from start of 
 * one of the needles is returned.
 **/
function mstrpos($haystack, $needles, $offset = 0, $last = false)
{
 if(!is_array($needles)) { $needles = array($needles); }
 $found = false;
 foreach($needles as $needle)
 {
 $position = strpos($haystack, (string)$needle, $offset);
 if($position === false) { continue; }
 $exp = $last ? ($found === false || $position > $found) : 
 ($found === false || $position < $found);
 if($exp) { $found = $position; }
 }
 return $found;
}
/**
 * Find the position of the first (partially) occurrence of a substring in a 
 * string.
 * 
 * This function is simulair to function strpos() except that it wil return a 
 * position when the substring is partially located at the end of the string.
 *
 * @param string $haystack The string to search in.
 * @param mixed $needle The needle to search for.
 * @param integer $offset If specified, search will start this number of 
 * characters counted from the beginning of the 
 * string.
 **/
function pstrpos($haystack, $needle, $offset = 0)
{
 $position = strpos($haystack, $needle, $offset);
 if($position !== false) { return $position; }
 
 for($i = strlen($needle); $i > 0; $i--)
 {
 if(substr($needle, 0, $i) == substr($haystack, -$i))
 { return strlen($haystack) - $i; }
 }
 return false;
}
/**
 * Find the position of the first (partially) occurrence of one or more 
 * substrings in a string.
 * 
 * This function is simulair to function strpos() except that it allows to 
 * search for multiple needles at once and it wil return a position when one of
 * the substrings is partially located at the end of the string.
 *
 * @param string $haystack The string to search in.
 * @param mixed $needles Array containing needles or string containing 
 * needle.
 * @param integer $offset If specified, search will start this number of 
 * characters counted from the beginning of the 
 * string.
 * @param boolean $last If TRUE then the farthest position from the start 
 * of one of the needles is returned.
 * If FALSE then the smallest position from start of 
 * one of the needles is returned.
 **/
function mpstrpos($haystack, $needles, $offset = 0, $last = false)
{
 if(!is_array($needles)) { $needles = array($needles); }
 $found = false;
 foreach($needles as $needle)
 {
 $position = pstrpos($haystack, (string)$needle, $offset);
 if($position === false) { continue; }
 $exp = $last ? ($found === false || $position > $found) : 
 ($found === false || $position < $found);
 if($exp) { $found = $position; }
 }
 return $found;
}
?>