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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 |
|---|---|
| 508 | <?php |
| 509 | /** |
| 510 | * Filters the title field placeholder text. |
| 511 | * |
| 512 | * @since 3.1.0 |
| 513 | * |
| 514 | * @param string $text Placeholder text. Default 'Add title'. |
| 515 | * @param WP_Post $post Post object. |
| 516 | */ |
| 517 | $title_placeholder = apply_filters( 'enter_title_here', __( 'Add title' ), $post ); |
| 518 | ?> |
| 519 | <label class="screen-reader-text" id="title-prompt-text" for="title"><?php echo $title_placeholder; ?></label> |
| 520 | <input type="text" name="post_title" size="30" value="<?php echo esc_attr( $post->post_title ); ?>" id="title" spellcheck="true" autocomplete="off" /> |
| 521 | </div> |
| 522 | <?php |
| 523 | /** |
| 524 | * Fires before the permalink field in the edit form. |
| 525 | * |
| 526 | * @since 4.1.0 |