What is the difference between using onchange in PHP and JavaScript?

When using onchange in PHP, the action is triggered on the server side when the value of an input element changes, which requires a page reload. On the other hand, using onchange in JavaScript allows for dynamic updates on the client side without the need for a page refresh. 

// PHP code using onchange in HTML form
<form action="" method="post">
    <input type="text" name="input_field" onchange="this.form.submit()">
</form>

Keywords

onchange PHP JavaScript event handling form input

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