How to properly remove meta tag in wp_head?

Hi,

Thank you for choosing Master Slider.
To disable meta tags, add the below code to functions.php in your theme:

/**
 * Make sure the function does not exist before defining it
 */
if( ! function_exists( 'msp_remove_class_filter' ) ){

    function msp_remove_class_filter( $tag, $class_name = '', $method_name = '', $priority = 10 ) {
        global $wp_filter;
        // Check that filter actually exists first
        if ( ! isset( $wp_filter[ $tag ] ) ) {
            return FALSE;
        }

        if ( is_object( $wp_filter[ $tag ] ) && isset( $wp_filter[ $tag ]->callbacks ) ) {
            // Create $fob object from filter tag, to use below
            $fob       = $wp_filter[ $tag ];
            $callbacks = &$wp_filter[ $tag ]->callbacks;
        } else {
            $callbacks = &$wp_filter[ $tag ];
        }
        // Exit if there aren't any callbacks for specified priority
        if ( ! isset( $callbacks[ $priority ] ) || empty( $callbacks[ $priority ] ) ) {
            return FALSE;
        }
        // Loop through each filter for the specified priority, looking for our class & method
        foreach ( (array) $callbacks[ $priority ] as $filter_id => $filter ) {
            // Filter should always be an array - array( $this, 'method' ), if not goto next
            if ( ! isset( $filter['function'] ) || ! is_array( $filter['function'] ) ) {
                continue;
            }
            // If first value in array is not an object, it can't be a class
            if ( ! is_object( $filter['function'][0] ) ) {
                continue;
            }
            // Method doesn't match the one we're looking for, goto next
            if ( $filter['function'][1] !== $method_name ) {
                continue;
            }
            // Method matched, now let's check the Class
            if ( get_class( $filter['function'][0] ) === $class_name ) {
                // WordPress 4.7+ use core remove_filter() since we found the class object
                if ( isset( $fob ) ) {
                    // Handles removing filter, reseting callback priority keys mid-iteration, etc.
                    $fob->remove_filter( $tag, $filter['function'], $priority );
                } else {
                    // Use legacy removal process (pre 4.7)
                    unset( $callbacks[ $priority ][ $filter_id ] );
                    // and if it was the only filter in that priority, unset that priority
                    if ( empty( $callbacks[ $priority ] ) ) {
                        unset( $callbacks[ $priority ] );
                    }
                    // and if the only filter for that tag, set the tag to an empty array
                    if ( empty( $callbacks ) ) {
                        $callbacks = array();
                    }
                    // Remove this filter from merged_filters, which specifies if filters have been sorted
                    unset( $GLOBALS['merged_filters'][ $tag ] );
                }
                return TRUE;
            }
        }
        return FALSE;
    }
}

add_action( 'plugins_loaded', function(){
    msp_remove_class_filter( 'wp_head', 'MSP_Frontend_Assets', 'meta_generator' );
});

If you need any further information, please let me know.

Best,

Thanks for your inspiration, I work it on another plugin so I changed a bit of the calling code to

function remove_msp_meta() {
  msp_remove_class_filter( 'wp_head', 'MSP_Frontend_Assets', 'meta_generator' );
}
// put it to (9) earlier then the meta_generator (10) to add the action so that this action will be called before priority 10 and remove the queued 'meta_generator' from priority 10 action before running
add_action( 'wp_head', 'remove_msp_meta', 9);

Thanks a lot.

Hi again,

I’m glad it has been resolved.
Please let us know if you have any more issues.

Best,