fixed function collisions

Author: Athlon1600

src/helpers.php

@@ -7,21 +7,27 @@ function clean_content_type($content_type){
 	return trim(preg_replace('@;.*@', '', $content_type));
 }
 
-function starts_with($haystack, $needles){
-	foreach( (array)$needles as $n){
-		if($n !== '' && stripos($haystack, $n) === 0){
-			return true;
+
+if(!function_exists('starts_with')){
+	
+	function starts_with($haystack, $needles){
+		foreach( (array)$needles as $n){
+			if($n !== '' && stripos($haystack, $n) === 0){
+				return true;
+			}
 		}
+		
+		return false;
 	}
-	
-	return false;
 }
 
-function str_before($subject, $search){
-	return $search === '' ? $subject : explode($search, $subject)[0];
+if(!function_exists('str_before')){
+	
+	function str_before($subject, $search){
+		return $search === '' ? $subject : explode($search, $subject)[0];
+	}
 }
 
-
 function is_html($content_type){
 	return clean_content_type($content_type) == 'text/html';
 }