I have a website, and on it I have a form with check-boxes to be filled. In PHP, I am wondering if there is a checked attribute which works when focus is lost on the check-box, not when the submit button us clicked. I have tried
if (isset($_POST['check1'])) {
// Checkbox is selected
} else {
// Alternate code
}
but it only works when the submit button is clicked. Is there any other way to do this?
Since PHP is a server-side script (https://en.wikipedia.org/wiki/Server-side_scripting), there's no way to instantiate code on a client-side (https://en.wikipedia.org/wiki/Client-side_scripting) event (such as loss of focus). To check if the checkbox is checked BEFORE the form is submitted, you will need to run a javascript/JQuery script.
For instance, you could use AJAX with JQuery to trigger the event.
$(function(){
$('.checkbox').focusout(function(){
$.ajax({
...
});
});
});
Then you would have the $.ajax(); function point to a PHP script to execute whatever you need done.
You can find more here:
$.ajax(): http://api.jquery.com/jquery.ajax/focusout(): https://api.jquery.com/focusout/You can easily achieve this with use of ajax. Fire a function when user interact
<input type='checkbox' onblur='checkbox()' />
function checkbox(){
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
console.log(xhttp.responseText);
}
};
xhttp.open("GET", "checkbox.php", true);
xhttp.send();
}
Using onblur wont give you the desired results try changing it to different events see which matches your need
Here is the list of all events in HTML DOM EVENT
