How to execute a function after clicking a button

How to execute a function after clicking a button? The code is as follows: PHPcode & lt; inputtype & quot; button & quot; value & quot; send notification & quot; id & quot; sendnotice & quot; & gt; if you want to click "send notification", execute a PHP function (about PHPsocket. ------ Solution ------- how to execute a function after clicking a button?
The code is as follows:

PHP code

If you want to click "send notification", execute a PHP function (about PHP socket.

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Jquery ajax is easy to use.
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It can only trigger foreground events. php is in the background, so the server needs to execute the file through the request.
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Use AJAX.

Or directly submit form,

Or submit the form to iframe for processing.
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Discussion

Reference:


It can only trigger foreground events. php is in the background, so the server needs to execute the file through the request.

I mainly want to use PHP socket, so I want to execute PHP functions. Can I use AJAX to implement socket?

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PHP code