1/21/2024 0 Comments Php post checkbox valueIn this example, the value of the for attribute of the element is the same as the value of the id attribute of the checkbox. Therefore, you should always use a checkbox with a element like this: I agree Code language: HTML, XML ( xml ) The filter_has_var() function returns true if the checkbox_name exists in the INPUT_POST.Ī checkbox has no label. To check if a checkbox is checked, you can also use the filter_has_var() function like this: if(filter_has_var(INPUT_POST, 'checkbox_name')) Code language: JavaScript ( javascript ) ![]() ![]() It means that the following expression returns false: isset($_POST) Code language: PHP ( php ) However, if you uncheck the checkbox and submit the form, the $_POST won’t have any element with key checkbox_name. echo $_POST // 'checkbox_value' Code language: PHP ( php ) If you check the checkbox and submit the form using the POST method, the $_POST associative array will contain an element whose key is checkbox_name and value is checkbox_value. To create a checkbox, you use the input element with the type checkbox as follows: Code language: HTML, XML ( xml )Ī checkbox has two states: checked and unchecked. A quick introduction to the checkbox elementĪ checkbox allows you to select a single value for submission in a form. Summary: in this tutorial, you will learn how to use PHP to process a form with one or more checkboxes.
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