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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 3547 | * |
| 3548 | * If a non-empty string is passed, the filter is evaluated on the wp_richedit_pre() |
| 3549 | * return after being formatted. |
| 3550 | * |
| 3551 | * @since 2.0.0 |
| 3552 | * @deprecated 4.3.0 |
| 3553 | * |
| 3554 | * @param string $output Text for the rich text editor. |
| 3555 | */ |
| 3556 | return apply_filters( 'richedit_pre', '' ); |
| 3557 | } |
| 3558 | |
| 3559 | $output = convert_chars($text); |
| 3560 | $output = wpautop($output); |
| 3561 | $output = htmlspecialchars($output, ENT_NOQUOTES, get_option( 'blog_charset' ) ); |
| 3562 | |
| 3563 | /** This filter is documented in wp-includes/deprecated.php */ |
| 3564 | return apply_filters( 'richedit_pre', $output ); |
| 3565 | } |
| 3566 | |
| 3567 | /** |
| 3568 | * Formats text for the HTML editor. |
| 3569 | * |
| 3570 | * Unless $output is empty it will pass through htmlspecialchars before the |
| 3571 | * {@see 'htmledit_pre'} filter is applied. |
| 3572 | * |
| 3573 | * @since 2.5.0 |