PHP How to Easily Disable or Enable Submit Button with PHP

In PHP Extremely Easy to Disable or Enable Submit Button with PHP - Has NOTHING to do with Jquery. One Simple PHP Variable

In your php code you will create a variable such as $enablesubmit = 'disabled' and then a php variable for each of the form elements that will be toggled to true or 1 for each form element that is submitted successfully..

For example, lets say there are 3 form elements with the names inputname, inputaddress, inputphone. You create 3 php variables with the names $binputname, $binputaddress, $binputphone

Make sure to place this variable NOT within a function and NOT within the code that runs php code if the form has been submitted $_SERVER["REQUEST_METHOD"] == "POST".

In other words $enablesubmit will be a public PHP variable.

Then within the if($_SERVER["REQUEST_METHOD"] == "POST"){ you would check to see that all the POST form elements meet the conditions in which you would want the submit button to be enabled ...

foreach($_POST as $key => $value) { switch ($key) { case 'inputname': // CODE THAT WILL CHECK THAT WHATEVER CONDITIONS YOU WANT WITH THE TEXT // PROVIDED FOR THE INPUT ELEMENT WITH THE NAME 'inputname' HAS BEEN MET $binputname = 1; break; case 'inputaddress': // CODE THAT WILL CHECK THAT WHATEVER CONDITIONS YOU WANT WITH THE TEXT // PROVIDED FOR THE INPUT ELEMENT WITH THE NAME 'inputname' HAS BEEN MET $binputaddress = 1; break; case 'inputphone': // CODE THAT WILL CHECK THAT WHATEVER CONDITIONS YOU WANT WITH THE TEXT // PROVIDED FOR THE INPUT ELEMENT WITH THE NAME 'inputname' HAS BEEN MET $binputphone = 1; break; } // AT THE END OF ALL THE FORM ELEMENTS BEING CHECK FOR SUCCESSFUL CONDITIONS BEING MET If(binputname && binputaddress && binputphone){ $enablesubmit = ''; } }

Then in the form submitted button html code on the web page ...

<form action="<?php echo htmlspecialchars($_SERVER["REQUEST_URI"]);?>" id="formcreateaccount" method="POST"> <input name="inputname" type="text"> <input name="inputaddress" type="text"> <input name="inputphone" type="text"> <input type="submit" <?=$enablesubmit?>> </form>

Now, if the page is loaded and the form data has not been submitted, the default value of the php variable $enablesubmit equals disabled. If the form is submitted and the form elements meet the desired condition in the php code at the top of the page, $enablesubmit equals '', meaning disabled won't get output in the form submit button so the form submit button will now be enabled.