[7.x] 3.5x faster micro performance enhancement for data_get() (#32192)

* Replace while:array_shift with foreach:unset

Operation is 10x faster

* fix code style

* fix code style

* add null check

* change `$segment===null` to `is_null($segment)`

src/Illuminate/Support/helpers.php

@@ -142,7 +142,13 @@ function data_get($target, $key, $default = null)
 
         $key = is_array($key) ? $key : explode('.', $key);
 
-        while (! is_null($segment = array_shift($key))) {
+        foreach ($key as $i => $segment) {
+            unset($key[$i]);
+
+            if (is_null($segment)) {
+                return $target;
+            }
+
             if ($segment === '*') {
                 if ($target instanceof Collection) {
                     $target = $target->all();