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The fourth parameter of add_event_handler function was used to tell the number of parameters which will be transmitted to the callback. This is no longer used: all parameters given to trigger_change or trigger_notify are always transmitted to all callback.
But the fourth parameter is still used: if a string is given it will be used as a file path included just before the callback (with include_once).
// procedural add_event_handler('init', 'my_init', EVENT_HANDLER_PRIORITY_NEUTRAL, MY_PLUGIN_PATH . 'include/callbacks.php' ); // OOP with static method add_event_handler('init', array('MyClass', 'init'), EVENT_HANDLER_PRIORITY_NEUTRAL, MY_PLUGIN_PATH . 'include/myclass.php' );
If the 4th parameter is anything else than a string it is ignored.
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We added an option to disable or enable the website field on comment add form. You must wrap the field in a IF block:
{if $comment_add.SHOW_WEBSITE} ... {/if}