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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 |
|---|---|
| 778 | |
| 779 | /** |
| 780 | * Filters the default post content initially used in the "Write Post" form. |
| 781 | * |
| 782 | * @since 1.5.0 |
| 783 | * |
| 784 | * @param string $post_content Default post content. |
| 785 | * @param WP_Post $post Post object. |
| 786 | */ |
| 787 | $post->post_content = (string) apply_filters( 'default_content', $post_content, $post ); |
| 788 | |
| 789 | /** |
| 790 | * Filters the default post title initially used in the "Write Post" form. |
| 791 | * |
| 792 | * @since 1.5.0 |
| 793 | * |
| 794 | * @param string $post_title Default post title. |
| 795 | * @param WP_Post $post Post object. |
| 796 | */ |