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Is there any hook which is fired only when the post is "published" for the first time.

I dont want to execute my code when the post is "updated" or when its status is set to "not-published" and then "published" again.

EDIT:

add_action('draft_to_published','func_tion');

function func_tion($post){
    $post_id = $post->ID;   

    if ( !get_post_meta( $post_id, 'mycoderan', $single = true ) )
    // run code to manipulate data
    wp_enqueue_script('plugin_name',plugin_dir_url(__FILE__ ).'script.js');
    $params = array() // set parameters
    wp_localize_script('plugin_name', 'params', $params );
    update_post_meta( $post_id, 'mycoderan', true );
}
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You have to enclose everything in the if statement inside { ... } braces. w3schools.com/php/php_if_else.asp –  soulseekah Apr 1 '12 at 17:01
    
I need similar functionality, but can't figure out how to check if a post is being published for the first time or not. draft_to_published action seem to be triggered every time a post is published from draft multiple times. Are you relying on post meta to check if a post is published for the 1st time. Is there any native WP function that can be used instead? –  dashaluna May 1 '13 at 17:33
    
@dashaluna Please review the answer to my other question. wordpress.stackexchange.com/questions/46783/… With Wordpress 3.5, there have been a few changes so what you've written is also possible. The flow script should be tremendous help in this. Helped me alot –  BAU May 3 '13 at 17:50
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1 Answer 1

up vote 4 down vote accepted

The {$old_status}_to_{$new_status} and {$new_status}_{$post->post_type} hooks tend to generally solve the problem.

To avoid running the code in case post status is changed to draft then published again (after already being published), implement a simple flag using the post_meta functionality.

Note: the updated hook should be 'draft_to_publish' instead of 'draft_to_published' however, the code below is not modified and should be if you plan to use in WP 3.5

add_action( 'draft_to_published', 'wpse47566_do_once_on_publish' );
function wpse47566_do_once_on_publish( $post ) {
    // check post type if necessary
    if ( $post->post_type != 'a_specific_type' ) return;

    $post_id = $post->ID;

    if ( !get_post_meta( $post_id, 'mycoderan', $single = true ) ) {
        // ...run code once
        update_post_meta( $post_id, 'mycoderan', true );
    }
}
share|improve this answer
    
my code should run on any category type so i dont think i need this line // check post type if necessary if ( $post->post_type != 'a_specific_type' ) return; i have written my query within this function to get the post data and then i have to run a script by passing the post data as parameters... your function requires the post as an argument... so is the following ok?? –  BAU Apr 1 '12 at 15:13
    
add_action( 'draft_to_published', 'func_tion' ); function func_tion() { /* query code */ if ( !get_post_meta( $post_id, 'mycoderan', $single = true ) ) // ...run code once update_post_meta( $post_id, 'mycoderan', true ); } –  BAU Apr 1 '12 at 15:16
    
the {$status}_to_{$status} action passes on the $post object, so $post_id = $post->ID, fixed my answer. –  soulseekah Apr 1 '12 at 15:17
    
i'm sorry i didnt know comments cannot process new-lines... i have only written the query to get post data inside the function... then i enqueue and localize the script inside the // run code once block... is that ok?? –  BAU Apr 1 '12 at 15:18
    
i have edited the question... please let me know why my script is not executing.. where am i going wrong?? –  BAU Apr 1 '12 at 15:39
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