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You could do that, but the proper way would be to create a plugin.
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You could do that, but the proper way would be to create a plugin.

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Michael is correct. &nbsp;Here is a tutorial: <a href="https://www.youtube.com/watch?v=g0Gz-SZXApI" rel="ugc">https://www.youtube.com/watch?v=g0Gz-SZXApI</a>&nbsp;There are also a bunch of other tutorials on the internet. &nbsp;BUT placing it in the functions.php file will work just fine, as long as the function.php file is in your theme directory.
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Michael is correct.  Here is a tutorial: https://www.youtube.com/watch?v=g0Gz-SZXApI [https://www.youtube.com/watch?v=g0Gz-SZXApI] There are also a bunch of other tutorials on the internet.  BUT placing it in the functions.php file will work just fine, as long as the function.php file is in your theme directory.

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i would like to add a custom form to my website , by making short code.<br />
do i need to include that in function.php?
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i would like to add a custom form to my website , by making short code.
do i need to include that in function.php?

how can i create short code for custom form for my website using PHP, wordpress,HTML,CSS?

WordPress is a free and open-source content management system (CMS) based on PHP and MySQL for creating websites and blogs. Features include a plugin architecture, a template system and strong management, customization and search systems; through its dynamic presentation of content, webmasters have the flexibility to create websites easily.

WordPress

HTML (HyperText Markup Language) is the main markup language for creating web pages and other information to be displayed in a web browser, providing both the structure and content for what is sent from a web server through the use of tags. The current implementation of the HTML specification is HTML5.