How to use external javascript/php in wordpress

Question

I am trying to use a javascript file from an external source on my WordPress site and can't seem to get it to work. It is a specific Captcha I need to include.

The directions from the site are to include the following:

In the HTML include the following:

<div data-captcha-enable="true"></div>

Add the following JavaScript in the body (site info hidden in asteriks) :

<script src="//*site*/captcha.js.php?id=*xxx*"></script>

Including both of those in the HTML of a page did not work, and reading into WordPress allowance of scripts it seems this is intentional.

So next I tried to include it in the functions.php through

function wpTest_scripts() {
  wp_register_script('captcha', '//*site*/captcha.js.php?id=*xxx*', false);
  wp_enqueue_script( 'captcha' );
 }
add_action('wp_enqueue_scripts', 'wpTest_scripts');

I tried a ton of different varieties of this, and including all sorts variations of

<script src="//*site*/captcha.js.php?id=*xxx*"></script>

in the header, main body etc.

Finally as a last stab I tried to follow advice for allowing scripts in pages within a WordPress site globally. I know this isn't as secure, but there are no other users of the page and it is a very simple page. This is also creating an error:

In wp-config.php

define( 'CUSTOM_TAGS', true );

In functions.php

function add_scriptfilter( $string ) {
global $allowedtags;
$allowedtags['script'] = array( 'src' => array () );
return $string;
}
add_filter( 'pre_kses', 'add_scriptfilter' );

This creates an error from the functions.php in this line:

$allowedtags['script'] = array( 'src' => array () );

The error is: Parse error: syntax error, unexpected '=', expecting ')' in

Answer 1

The easiest way might be just by opening the footer.php file of your current active theme.

And pasting the code just before </body>

    <?php wp_footer(); // and other stuff above ?>
    <script src="//*site*/captcha.js.php?id=*xxx*"></script>
</body>
</html>