To add live Ajax search in WordPress, first copy the code from step one into the functions.php file, then go to the desired page and add an Ajax search to the page with the [asearch] shortcode.
To add a contact form in Wordpress, first go to the functions.php file and copy the form processor code from step one into it. Then go to the contact page you created and paste the HTML code of the form from step two in a custom HTML block and publish the page.
To add PHP code in WordPress, first create a child theme, then go to the functions.php file and paste your code in it, use guide below to insert PHP code in Wordpress for Only Specific Pages.
To add a preloader in Wordpress, first copy the code of the second step in the functions.php file, then replace the link of your desired animation loader with the default loader and enter the duration of the loader display, and save the file.
To to create Custom login page in WordPress, first copy one of the following three templates in the functions.php file. Then replace the default background image and the logo with your own and save the file.
To redirect pages in WordPress without plugins, first copy the code of step 2 in the functions.php file, then change the "from" and "to" URLs to your desired URLs, and save the file.
To create a child theme, first find the "Text Domain" of your current theme in the stylesheet file. Then create the three files described in step two, zip them, and upload them to the site's themes section.