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WP_Hook::current_priority

Return the current priority level of the currently running iteration of the hook.

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WP_Hook::next

Moves forward to the next element.

WP_Hook::key

Returns the key of the current element.

WP_Hook::valid

Checks if current position is valid.

WP_Hook::has_filter

Checks if a specific action has been registered for this hook.

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WP_Hook::rewind

Rewinds the Iterator to the first element.

WP_Hook::has_filters

Checks if any callbacks have been registered for this hook.