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I would like the user to just click on APPLY (after entering the coupon code) and then without refreshing the page, to have some PHP code run so it computes the corresponding discount. How would this be done using javascript? You need to use either the onsubmit event of the form or the onclick event of the button.
When to run reload refresh function in JavaScript?
If you only want to run it when the page is reloaded, not when it’s loaded for the first time, you could use sessionStorage to pass this information.
How does the header function work in PHP?
The PHP header () function sends an HTTP header to a client or browser in raw form. Before HTML, XML, JSON or other output has been sent to a browser or client, a raw data is sent with the request (especially HTTP Request) made by the server as header information.
Which is an optional parameter in PHP refresh?
$replace: It is optional parameter. It denotes the header should replace previous or add a second header. The default value is True (will replace). If $replace value is False then it force multiple headers of the same type. $http_response_code: It is an optional parameter.
How to call a PHP function on the click?
In foo.php your form will call foo.php on post Once the form has been submitted it will call itself ( foo.php) and you can catch it via the PHP predefined variable $_SERVER as shown in the code below The onclick attribute in HTML calls JavaScript functions, not PHP functions.
Do you need Ajax to call a function in PHP?
Yes, you need Ajax here. Please refer to the code below for more details. You should make the button call the same page and in a PHP section check if the button was pressed: You cannot call PHP functions like clicking on a button from HTML. Because HTML is on the client side while PHP runs server side.
How to add PHP code to a WordPress post or page?
The recommended way to add PHP functions is to modify the child theme or create custom page templates. Despite so, there are occasions where you might want to add specific PHP functions to an individual post or page. In these cases, you can override the rule using WordPress code widget plugins.