What is the default behavior of unchecked checkboxes in PHP form input type checkbox arrays?

Unchecked checkboxes in PHP form input type checkbox arrays do not get submitted in the form data. To handle unchecked checkboxes, you can check if the checkbox is set in the form data using the isset() function. If it is not set, you can set a default value for it in your PHP code. 

// Example of handling unchecked checkboxes in PHP form input type checkbox arrays
$checkbox_values = $_POST['checkbox_values'];

// Check if checkbox is set, if not, set a default value
$checkbox1 = isset($checkbox_values['checkbox1']) ? $checkbox_values['checkbox1'] : 'unchecked';
$checkbox2 = isset($checkbox_values['checkbox2']) ? $checkbox_values['checkbox2'] : 'unchecked';

// Now you can use $checkbox1 and $checkbox2 in your code

Keywords

PHP form input checkbox arrays default behavior unchecked checkboxes

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