added parser_autoload | updated

tools/parser_sql/php_sql_parser_autoload.php

@@ -0,0 +1,47 @@
+<?php
+/**
+* 2010-2021 Webkul.
+*
+* NOTICE OF LICENSE
+*
+* All right is reserved,
+* Please go through this link for complete license : https://store.webkul.com/license.html
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade this module to newer
+* versions in the future. If you wish to customize this module for your
+* needs please refer to https://store.webkul.com/customisation-guidelines/ for more information.
+*
+*  @author    Webkul IN <support@webkul.com>
+*  @copyright 2010-2021 Webkul IN
+*  @license   https://store.webkul.com/license.html
+*/
+
+require_once __DIR__.'/PHPSQLParser.php';
+
+function classAutoLoader($class)
+{
+    // check if php sql parser file is called
+    if(0 !== strpos($class, 'PHPSQLParser')) {
+        return;
+    }
+
+    $className = end(explode('\\', $class));
+    if(class_exists($className)) {
+        return;
+    }
+
+    $class = str_replace('PHPSQLParser\\', '', $class);
+
+    // create path for required file
+    $classFile = __DIR__.'/'.str_replace('\\', '/', $class).'.php';
+
+    if (!file_exists($classFile) || !is_file($classFile)) {
+        return;
+    }
+
+    require $classFile;
+}
+
+spl_autoload_register('classAutoLoader');