Hooks::register( string $hook, callable $callback, int $priority )
Register a callback for a hook
Parameters
- $hook
-
(Required) Hook name
- $callback
-
(Required) Function/method to call on event
- $priority
-
(Required) Priority number. <0 is executed earlier, >0 is executed later
Source
File: wp-includes/Requests/src/Hooks.php
public function register($hook, $callback, $priority = 0) {
if (is_string($hook) === false) {
throw InvalidArgument::create(1, '$hook', 'string', gettype($hook));
}
if (is_callable($callback) === false) {
throw InvalidArgument::create(2, '$callback', 'callable', gettype($callback));
}
if (InputValidator::is_numeric_array_key($priority) === false) {
throw InvalidArgument::create(3, '$priority', 'integer', gettype($priority));
}
if (!isset($this->hooks[$hook])) {
$this->hooks[$hook] = [
$priority => [],
];
} elseif (!isset($this->hooks[$hook][$priority])) {
$this->hooks[$hook][$priority] = [];
}
$this->hooks[$hook][$priority][] = $callback;
}