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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 |
|---|---|
| 552 | <?php |
| 553 | /** |
| 554 | * Filters the title field placeholder text. |
| 555 | * |
| 556 | * @since 3.1.0 |
| 557 | * |
| 558 | * @param string $text Placeholder text. Default 'Enter title here'. |
| 559 | * @param WP_Post $post Post object. |
| 560 | */ |
| 561 | $title_placeholder = apply_filters( 'enter_title_here', __( 'Enter title here' ), $post ); |
| 562 | ?> |
| 563 | <label class="screen-reader-text" id="title-prompt-text" for="title"><?php echo $title_placeholder; ?></label> |
| 564 | <input type="text" name="post_title" size="30" value="<?php echo esc_attr( $post->post_title ); ?>" id="title" spellcheck="true" autocomplete="off" /> |
| 565 | </div> |
| 566 | <?php |
| 567 | /** |
| 568 | * Fires before the permalink field in the edit form. |
| 569 | * |
| 570 | * @since 4.1.0 |