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Andrew Folts
14,238 PointsAll WP functions UNDEFINED in mailer.php when creating a contact form?
I'm creating a simple AJAX contact form with the ACTION being "/php/mailer.php".
However, when I submit the form, I get an UNDEFINED error in the console for any Wordpress functions I use in that file. For example "wp_mail() or "get_site_url()".
What the heck is going on???
1 Answer
Luke Towers
18,572 PointsNone of the WordPress code has been loaded by your mailer.php file. The way PHP works is it is executed on a per file basis. So, when someone makes a normal request to your WordPress website, it is all being run through index.php which takes care of the loading of all of the WordPress PHP files required.
In order to have access to those same WP functions, your mailer.php script must load the WordPress files itself before it can use the functions contained within. There is a great StackOverflow answer addressing just this use case, the gist of it however is that you need to include the wp-load.php file in your mailer.php file through the addition of
require_once(PATH/TO/wp-load.php);
to the top of your mailer.php file.
Andrew Folts
14,238 PointsAndrew Folts
14,238 PointsAh, I see. Thanks for a great explanation!
Luke Towers
18,572 PointsLuke Towers
18,572 PointsNo problem, happy to help out!