How can PHP code be executed only when a form's submit button is pressed?

To execute PHP code only when a form's submit button is pressed, you can check if the form has been submitted using the isset() function on the submit button's name attribute. If the submit button has been pressed, then the PHP code inside the conditional block will be executed. 

<?php
if(isset($_POST['submit'])){
    // PHP code to execute when the form's submit button is pressed
}
?>

Keywords

PHP form submission button press event handling conditional execution

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