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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 |
|---|---|
| 560 | |
| 561 | /** |
| 562 | * Filter the default post content initially used in the "Write Post" form. |
| 563 | * |
| 564 | * @since 1.5.0 |
| 565 | * |
| 566 | * @param string $post_content Default post content. |
| 567 | * @param WP_Post $post Post object. |
| 568 | */ |
| 569 | $post->post_content = apply_filters( 'default_content', $post_content, $post ); |
| 570 | |
| 571 | /** |
| 572 | * Filter the default post title initially used in the "Write Post" form. |
| 573 | * |
| 574 | * @since 1.5.0 |
| 575 | * |
| 576 | * @param string $post_title Default post title. |
| 577 | * @param WP_Post $post Post object. |
| 578 | */ |