form validation if checkbox is cheched

To know if a checkbox is checked it’s simple. If it is checked, the value is sent. If it is not checked, no value is sent. 

With this checkbox, if it is checked when you submit the form, in the controller you will get 3, if it is not, you will get NULL.

Code:

<input name='id_media_club[1]' id="checkbox_1 " type="checkbox" value="3">

CodeIgniter 4 tutorials (EN/FR) - https://includebeer.com
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