Create string_search.php

src/string_search.php

@@ -0,0 +1,24 @@
+<?php
+/*
+  Accept two parameters, string to search for (needle) 
+  and string to search (haystack).  If needle is found 
+  in haystack multiple times, return the first index.
+  Otherwise, return false. If needle is empty, return 
+  false.
+*/
+
+function string_search($n, $h) {
+
+    if ($n == '') {
+        return false;
+    }
+
+    $pos = strpos ( $h, $n );
+
+    if ($pos === false) {
+        return false;
+    } else {
+        return "Found '" . $n . "' at index " . $pos;
+    }
+}
+?>