Change it to:
add_action( 'init', 'xxxxx_wpcf7_add_shortcode' );
function xxxxx_wpcf7_add_shortcode() {
wpcf7_add_shortcode('postdropdown', 'createbox', true);
}↧
Takayuki Miyoshi on "[Plugin: Contact Form 7] After update "undefined function wpcf7_add_shortcode()""
↧