Apply php-cs-fixer rule for array_key_exists()

Author: nicolas-grekas

Field/FileFormField.php

@@ -60,7 +60,7 @@ public function setValue($value)
 
             // copy to a tmp location
             $tmp = sys_get_temp_dir().'/'.strtr(substr(base64_encode(hash('sha256', uniqid(mt_rand(), true), true)), 0, 7), '/', '_');
-            if (array_key_exists('extension', $info)) {
+            if (\array_key_exists('extension', $info)) {
                 $tmp .= '.'.$info['extension'];
             }
             if (is_file($tmp)) {

FormFieldRegistry.php

@@ -57,7 +57,7 @@ public function remove($name)
         $target = &$this->fields;
         while (\count($segments) > 1) {
             $path = array_shift($segments);
-            if (!array_key_exists($path, $target)) {
+            if (!\array_key_exists($path, $target)) {
                 return;
             }
             $target = &$target[$path];
@@ -80,7 +80,7 @@ public function &get($name)
         $target = &$this->fields;
         while ($segments) {
             $path = array_shift($segments);
-            if (!array_key_exists($path, $target)) {
+            if (!\array_key_exists($path, $target)) {
                 throw new \InvalidArgumentException(sprintf('Unreachable field "%s"', $path));
             }
             $target = &$target[$path];