We’ll create a simple app that allows users to order pizza toppings.įirst, create the following file and directory structure. And you can use the isset() function to check if the $_POST is set: isset($_POST) Code language: PHP ( php )Īlternatively, you can use the filter_has_var() function: filter_has_var(INPUT_POST, 'colors') Code language: PHP ( php ) PHP multiple checkboxes example If you don’t check any checkboxes and submit the form, the $_POST array won’t have the colors key. When you check three checkboxes and submit the form, the $_POST will contain an array of three selected values: array(3) Red Green Blue Code language: HTML, XML ( xml ) The following example shows a form that consists of three checkboxes with the same name ( colors) with different values "red", "green", and "blue". When PHP sees the square brackets ( ) in the field name, it’ll create an associative array of values where the key is the checkbox’s name and the values are the selected values. To get all the values from the checked checkboxes, you need to add the square brackets ( ) after the name of the checkboxes. When you submit the form, you’ll receive multiple values on the server under one name. How to handle multiple checkboxes on a formĪ form may contain multiple checkboxes with the same name. Summary: in this tutorial, you will learn how to handle a form with multiple checkboxes in PHP.
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