wordpress action hook samples add_action do_action (621)
Below is the wordpress action hook samples of add_action then do_action.This post url is http://feilong.org/add-action-do-action-wordpress-hook edit by feilong in nanjing
First in functions.php of your wordpress theme
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function hooked_function_one($var1,$var2){//the number is 2 echo '<p>'.$var1.'and'.$var2.'</p>'; }add_action( 'i_am_hook_name', 'hooked_function_one', 10, 2 );//must the same number as var function hooked_function_two($var){ echo '<p>'.$var.'</p>'; }add_action( 'i_am_hook_name', 'hooked_function_two', 91,1 ); function feilong_function(){ echo 'feilong is happy today.'; }add_action('feilonghook','feilong_function',2);//feilong_function is hooked function feilong_footer_message_plugin_setup() { add_action('wp_footer','feilong_blog_useful',100);//add a functon to the hook 'wp_footer',which is in wordpress core } function feilong_blog_useful(){ echo 'Is feilong.org useful for friends?'; } |
Then in page.php of your wordpress theme
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$c = 'var one '; $d = ' var two'; $e='this var is not used in fact.'; do_action('i_am_hook_name',$c,$d,$e);// $e is not used and can be cut off; remove_action( 'i_am_hook_name', 'hooked_function_two', 91,1 );//remove the second hooked functon only do_action('i_am_hook_name',$c,$d);// if remove_action with the order 91,then only hooked_function_one is hooked do_action('feilonghook');// no args is passed to the hooked function //remove_action( 'feilonghook', 'feilong_function', 2 );// remove the hook to the function //do_action('feilonghook');// if remove_action is true,nothing will happen this time. if( has_action( 'org' ) ) echo '<p> org hooks some function(s).</p>'; else echo '<p> org hooks nothing.</p>'; if( has_action( 'i_am_hook_name' ) ) echo '<p> i_am_hook_name hooks some function(s).</p>'; else echo '<p> i_am_hook_name hooks nothing.</p>'; echo did_action('i_am_hook_name');//check if done action of i_am_hook_name,return the times. if(did_action('plugins_loaded')) define('feilong_plugins_ready.',true);//if i_am_hook_name is done,then define the var add_action('plugins_loaded','feilong_footer_message_plugin_setup');//add a functon to the hook 'plugins_loaded'plugins_loaded is in wordpress core |
What does a hook in wordpress mean? In feilong's eyes,it just like a hook! A hook hooks something(that is,function or functions) or hooks nothing! If use the hook(do_action),the hooked fuction(s) wound start working!
本文更新网址：https://feilong.org/add-action-do-action-wordpress-hook
2011-05-02 ~ 2011-05-02
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分类： wordpress