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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 |
|---|---|
| 1644 | * @since 2.5.0 |
| 1645 | * |
| 1646 | * @param string $output The text to be formatted. |
| 1647 | * @return string Formatted text after filter applied. |
| 1648 | */ |
| 1649 | function wp_htmledit_pre($output) { |
| 1650 | if ( !empty($output) ) |
| 1651 | $output = htmlspecialchars($output, ENT_NOQUOTES); // convert only < > & |
| 1652 | |
| 1653 | return apply_filters('htmledit_pre', $output); |
| 1654 | } |
| 1655 | |
| 1656 | /** |
| 1657 | * Checks and cleans a URL. |
| 1658 | * |
| 1659 | * A number of characters are removed from the URL. If the URL is for displaying |
| 1660 | * (the default behaviour) amperstands are also replaced. The 'clean_url' filter |
| 1661 | * is applied to the returned cleaned URL. |
| 1662 | * |