How to determine whether we are in add New page/post/CPT or in edit page/post/CPT in wordpress admin?

4 comments

1. here is a function that i have:

   /**
    * is_edit_page 
    * function to check if the current page is a post edit page
    * 
    * @author Ohad Raz <admin@bainternet.info>
    * 
    * @param  string  $new_edit what page to check for accepts new - new post page ,edit - edit post page, null for either
    * @return boolean
    */
   function is_edit_page($new_edit = null){
       global $pagenow;
       //make sure we are on the backend
       if (!is_admin()) return false;
   
       
       if($new_edit == "edit")
           return in_array( $pagenow, array( 'post.php',  ) );
       elseif($new_edit == "new") //check for new post page
           return in_array( $pagenow, array( 'post-new.php' ) );
       else //check for either new or edit
           return in_array( $pagenow, array( 'post.php', 'post-new.php' ) );
   }
   

   Usage
   the usage is simple just like any other conditional tag , few examples:

   check for new or edit page:

   if (is_edit_page()){
      //yes its an edit/new post page
   }
   

   check for new post page:

   if (is_edit_page('new')){
      //yes its an new post page
   }
   

   check for edit post page:

   if (is_edit_page('edit')){
      //yes its an existing post page
   }
   

   combine this with a $typenow global to check for a specific post type edit page:

   global $typenow;
   if (is_edit_page('edit') && "Post_Type_Name" == $typenow){
      //yes its an edit page  of a custom post type named Post_Type_Name
   }
   

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2. I prefer get_current_screen(), as it is much simpler:

   $screen = get_current_screen();
     if ($screen->base == "post") {
   }
   

   This function returns an object that includes the screen’s ID, base, post type, and taxonomy, among other data points.

   (Codex)

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3. I wanted to enqueue script and styles only on specific new/edit post type screens. Created a function to check if i am on edit/new-post screen of the given CPT.

   /**
    * Check if 'edit' or 'new-post' screen of a 
    * given post type is opened
    * 
    * @param null $post_type name of post type to compare
    *
    * @return bool true or false
    */
   function is_edit_or_new_cpt( $post_type = null ) {
       global $pagenow;
   
       /**
        * return false if not on admin page or
        * post type to compare is null
        */
       if ( ! is_admin() || $post_type === null ) {
           return FALSE;
       }
   
       /**
        * if edit screen of a post type is active
        */
       if ( $pagenow === 'post.php' ) {
           // get post id, in case of view all cpt post id will be -1
           $post_id = isset( $_GET[ 'post' ] ) ? $_GET[ 'post' ] : - 1;
   
           // if no post id then return false
           if ( $post_id === - 1 ) {
               return FALSE;
           }
   
           // get post type from post id
           $get_post_type = get_post_type( $post_id );
   
           // if post type is compared return true else false
           if ( $post_type === $get_post_type ) {
               return TRUE;
           } else {
               return FALSE;
           }
       } elseif ( $pagenow === 'post-new.php' ) { // is new-post screen of a post type is active
           // get post type from $_GET array
           $get_post_type = isset( $_GET[ 'post_type' ] ) ? $_GET[ 'post_type' ] : '';
           // if post type matches return true else false.
           if ( $post_type === $get_post_type ) {
               return TRUE;
           } else {
               return FALSE;
           }
       } else {
           // return false if on any other page.
           return FALSE;
       }
   }
   

   to use the function, pass the post type name.

   /**
    * return true if 'edit' or 'new-post' screen of 'cpt_name' is opened
    */
   if ( is_edit_or_new_cpt('cpt_name') ) {
       // do something
   }
   

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4. i have this function

   if(!function_exists('is_post_edit_page')){
       function is_post_edit_page() {
           static $result = null;
           if ( $result === null ) {
               $result = false;
               if ( is_admin() ) {
                   if (
                       empty( $_POST )
                       &&
                       isset( $_GET['action'] )
                       &&
                       $_GET['action'] === 'edit'
                       &&
                       isset( $_GET['post'] )
                   ) {
                       // Display Edit Post page
                       $result = true;
                   } elseif (
                       isset( $_POST['action'] )
                       &&
                       $_POST['action'] === 'editpost'
                       &&
                       isset( $_POST['post_type'] )
                       &&
                       isset( $_POST['post_ID'] )
                       &&
                       strpos( wp_get_referer(), 'action=edit' ) !== false
                   ) {
                       // Submit Edit Post page
                       $result = true;
                   }
               }
           }
   
           return $result;
       }
   }
   

   which returns true in the edit page and false on the other pages…

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