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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
1157 | * |
1158 | * This hook only fires if the current post type is hierarchical, |
1159 | * such as pages. |
1160 | * |
1161 | * @since 2.5.0 |
1162 | * |
1163 | * @param string $column_name The name of the column to display. |
1164 | * @param int $post_id The current post ID. |
1165 | */ |
1166 | do_action( 'manage_pages_custom_column', $column_name, $post->ID ); |
1167 | } else { |
1168 |
|
1169 | /** |
1170 | * Fires in each custom column in the Posts list table. |
1171 | * |
1172 | * This hook only fires if the current post type is non-hierarchical, |
1173 | * such as posts. |
1174 | * |
1175 | * @since 1.5.0 |