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has_action › WordPress Function
Since2.5.0
已弃用n/a
› has_action ( $hook_name, $callback = false )
参数: (2) |
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Checks if any action has been registered for a hook.
When using the$callback
argument, this function may return a non-boolean value
that evaluates to false (e.g. 0), so use the ===
operator for testing the return value.