WordPress: 函數 add_action與add_filter的區別

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add_filter 程式碼

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function add_filter($tag, $function_to_add, $priority = 10, $accepted_args = 1) 
{ global $wp_filter, $merged_filters; $idx = _wp_filter_build_unique_id($tag, $function_to_add, $priority); $wp_filter[$tag][$priority][$idx] = array('function' => $function_to_add, 'accepted_args' => $accepted_args); unset( $merged_filters[ $tag ] ); return true; }

add_action 程式碼

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function add_action($tag, $function_to_add, $priority = 10, $accepted_args = 1) 
{ return add_filter($tag, $function_to_add, $priority, $accepted_args); }

所以結論是無區別