* Support php 5.3 for sql parser lib.

lib/sqlparser/vendor/phpmyadmin/sql-parser/src/Components/Reference.php

@@ -1,10 +1,9 @@
 <?php
+
 /**
  * `REFERENCES` keyword parser.
  */
 
-declare(strict_types=1);
-
 namespace PhpMyAdmin\SqlParser\Components;
 
 use PhpMyAdmin\SqlParser\Component;
@@ -13,13 +12,12 @@ use PhpMyAdmin\SqlParser\Parser;
 use PhpMyAdmin\SqlParser\Token;
 use PhpMyAdmin\SqlParser\TokensList;
 
-use function implode;
-use function trim;
-
 /**
  * `REFERENCES` keyword parser.
  *
- * @final
+ * @category   Keywords
+ *
+ * @license    https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
  */
 class Reference extends Component
 {
@@ -28,20 +26,20 @@ class Reference extends Component
      *
      * @var array
      */
-    public static $REFERENCES_OPTIONS = [
-        'MATCH' => [
+    public static $REFERENCES_OPTIONS = array(
+        'MATCH' => array(
             1,
             'var',
-        ],
-        'ON DELETE' => [
+        ),
+        'ON DELETE' => array(
             2,
             'var',
-        ],
-        'ON UPDATE' => [
+        ),
+        'ON UPDATE' => array(
             3,
             'var',
-        ],
-    ];
+        )
+    );
 
     /**
      * The referenced table.
@@ -65,11 +63,13 @@ class Reference extends Component
     public $options;
 
     /**
+     * Constructor.
+     *
      * @param Expression   $table   the name of the table referenced
      * @param array        $columns the columns referenced
      * @param OptionsArray $options the options
      */
-    public function __construct($table = null, array $columns = [], $options = null)
+    public function __construct($table = null, array $columns = array(), $options = null)
     {
         $this->table = $table;
         $this->columns = $columns;
@@ -83,9 +83,9 @@ class Reference extends Component
      *
      * @return Reference
      */
-    public static function parse(Parser $parser, TokensList $list, array $options = [])
+    public static function parse(Parser $parser, TokensList $list, array $options = array())
     {
-        $ret = new static();
+        $ret = new self();
 
         /**
          * The state of the parser.
@@ -124,10 +124,10 @@ class Reference extends Component
                 $ret->table = Expression::parse(
                     $parser,
                     $list,
-                    [
+                    array(
                         'parseField' => 'table',
-                        'breakOnAlias' => true,
-                    ]
+                        'breakOnAlias' => true
+                    )
                 );
                 $state = 1;
             } elseif ($state === 1) {
@@ -151,7 +151,7 @@ class Reference extends Component
      *
      * @return string
      */
-    public static function build($component, array $options = [])
+    public static function build($component, array $options = array())
     {
         return trim(
             $component->table