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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 |
|---|---|
| 2335 | $url = str_replace( '&', '&', $url ); |
| 2336 | $url = str_replace( "'", ''', $url ); |
| 2337 | } |
| 2338 | |
| 2339 | if ( ! is_array( $protocols ) ) |
| 2340 | $protocols = wp_allowed_protocols(); |
| 2341 | if ( wp_kses_bad_protocol( $url, $protocols ) != $url ) |
| 2342 | return ''; |
| 2343 | |
| 2344 | return apply_filters('clean_url', $url, $original_url, $_context); |
| 2345 | } |
| 2346 | |
| 2347 | /** |
| 2348 | * Performs esc_url() for database usage. |
| 2349 | * |
| 2350 | * @since 2.8.0 |
| 2351 | * @uses esc_url() |
| 2352 | * |
| 2353 | * @param string $url The URL to be cleaned. |