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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 |
|---|---|
| 2598 | $url = str_replace( '&', '&', $url ); |
| 2599 | $url = str_replace( "'", ''', $url ); |
| 2600 | } |
| 2601 | |
| 2602 | if ( ! is_array( $protocols ) ) |
| 2603 | $protocols = wp_allowed_protocols(); |
| 2604 | if ( wp_kses_bad_protocol( $url, $protocols ) != $url ) |
| 2605 | return ''; |
| 2606 | |
| 2607 | return apply_filters('clean_url', $url, $original_url, $_context); |
| 2608 | } |
| 2609 | |
| 2610 | /** |
| 2611 | * Performs esc_url() for database usage. |
| 2612 | * |
| 2613 | * @since 2.8.0 |
| 2614 | * @uses esc_url() |
| 2615 | * |
| 2616 | * @param string $url The URL to be cleaned. |