Balamir · January 27, 2018 21:14 · Jan 27, 2018
diff --git a/array_key_changer.php b/array_key_changer.php
@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * Single or multiple array key changer.
+ *
+ * @author Abdullah M CEYLAN
+ * @author URI http://www.abdullahceylan.com
+ *
+ * @param  {array} $array   Old array
+ * @param  {string | array} $old_key Old array keys that can be string or array
+ * @param  {string | array} $new_key New array key(s) that can be string or array
+ * @return {array}          New array with replaced keys
+ */
+function change_array_key( $array, $old_key, $new_key) {
+    if(!is_array($array)){ print 'You must enter a array as a haystack!'; exit; }
+
+		if (is_array($old_key) && !is_array($new_key)) {
+			print 'You must enter a array as a new_key!'; exit;
+		} elseif (is_array($new_key) && !is_array($old_key)) {
+			print 'You must enter a array as a old_key!'; exit;
+		}
+
+		$new_array = $array;
+
+		if (is_array($old_key)) {
+			$keyfound = false;
+			$key_index = 0;
+			foreach ($old_key as $key) {
+				if (!array_key_exists($key, $array)){
+					$key_index++;
+					continue;
+		    }
+				$keyfound = true;
+
+				$new_array = search_array_and_replace($new_key[$key_index], $key, $new_array);
+				$key_index++;
+			}
+			if (!$keyfound) {
+				return $array;
+			} else {
+				return $new_array;
+			}
+		} elseif (!array_key_exists($old_key, $array)){
+      return $array;
+    }
+
+    return search_array_and_replace($new_key, $old_key, $array);
+}
+
+function search_array_and_replace($new_key, $old_key, $array) {
+	$keyPosition = array_search($old_key, array_keys($array));
+	$arrayBeforeKey = array_slice($array, 0, $keyPosition);
+	$arrayAfterKey = array_slice($array, $keyPosition + 1);
+	$arrayReplaced = array($new_key => $array[$old_key]);
+
+	return $arrayBeforeKey + $arrayReplaced + $arrayAfterKey;
+}
+
+?>