How can you determine if a checkbox has been checked in PHP?

To determine if a checkbox has been checked in PHP, you can check if the checkbox input field is present in the form submission data and if its value is set. If the checkbox is checked, its value will be present in the form data. You can use the isset() function to check if the checkbox value is set in the $_POST or $_GET superglobals. 

if(isset($_POST['checkbox_name']) && $_POST['checkbox_name'] == 'on') {
    // Checkbox is checked
    // Perform necessary actions here
} else {
    // Checkbox is not checked
}

Keywords

PHP checkbox checked isset form submission

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