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@3zzy
Created July 25, 2015 09:40
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strpos multiple needles
function strpos_array($haystack, $needles, $offset=0) {
$matches = array();
//Avoid the obvious: when haystack or needles are empty, return no matches
if(empty($needles) || empty($haystack)) {
return $matches;
}
$haystack = (string)$haystack; //Pre-cast non-string haystacks
$haylen = strlen($haystack);
//Allow negative (from end of haystack) offsets
if($offset < 0) {
$offset += $heylen;
}
//Use strpos if there is no array or only one needle
if(!is_array($needles)) {
$needles = array($needles);
}
$needles = array_unique($needles); //Not necessary if you are sure all needles are unique
//Precalculate needle lengths to save time
foreach($needles as &$origNeedle) {
$origNeedle = array((string)$origNeedle, strlen($origNeedle));
}
//Find matches
for(; $offset < $haylen; $offset++) {
foreach($needles as $needle) {
list($needle, $length) = $needle;
if($needle == substr($haystack, $offset, $length)) {
$matches[] = $offset;
break;
}
}
}
return($matches);
}
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