Add functions startsWithAny, startsWith

MD_STD.php

@@ -51,4 +51,38 @@ class MD_STD {
 
     }
 
+    /**
+     * Function checking if a string starts with another.
+     *
+     * @param string $haystack String to check.
+     * @param string $needle   Potential start of $haystack.
+     *
+     * @return boolean
+     */
+    public static function startsWith(string $haystack, string $needle):bool {
+
+        if (substr($haystack, 0, strlen($needle)) == $needle) return true;
+        else return false;
+
+    }
+
+    /**
+     * Function checking if a string starts with any input from the input array.
+     *
+     * @param string   $haystack String to check.
+     * @param string[] $needles  Array containing potential start values of $haystack.
+     *
+     * @return boolean
+     */
+    public static function startsWithAny(string $haystack, array $needles):bool {
+
+        $output = false;
+        foreach ($needles as $needle) {
+            $output = self::startsWith($haystack, $needle);
+            if ($output == true) return $output;
+        }
+        return $output;
+
+    }
+
 }