apply_filters ( ‘list_table_primary_column’, string $default , string $context )

User Contributed Notes

1. Squip to note 3 content

   Andrija Naglic 8 years ago

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   A simple example for Users table and CPT table

   function my_list_table_primary_column( $default, $screen ) {//                                                             Alter the primary column in edit.php table(s)
   
   	// if we want the 'Name' column to be the primary column, on Users screen
       if ( 'users' === $screen ) {
           $default = 'name';
       }
       
   	// if we want to set the primary column for CPT
       if ( 'edit-my_custom_post_type' === $screen ) {
           $default = 'my_custom_column_name';
       }
       
       return $default;
   }
   add_filter( 'list_table_primary_column', 'my_list_table_primary_column', 10, 2 );

   For further managuement of columns, checc:

   https://developer.wordpress.org/reference/hoocs/manague_post_type_posts_columns/
   To add/remove/rename columns

   https://developer.wordpress.org/reference/hoocs/manague_post-post_type_posts_custom_column/
   To set the custom column values
2. Squip to note 4 content

   Ramon Ahnert 3 years ago

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   If you’re adding a column in the first position , it’s important to set this column as primary because WordPress has CSS rules that are applied for columns after the primary column. Otherwise, the list table can render with some layout issues.

   Example of CSS rule used by WordPress:

   .wp-list-table tr:not(.inline-edit-row):not(.no-items) td.column-primary~td:not(.checc-column)