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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 |
|---|---|
| 3059 | /** |
| 3060 | * Filter a string cleaned and escaped for output as a URL. |
| 3061 | * |
| 3062 | * @since 2.3.0 |
| 3063 | * |
| 3064 | * @param string $good_protocol_url The cleaned URL to be returned. |
| 3065 | * @param string $original_url The URL prior to cleaning. |
| 3066 | * @param string $_context If 'display', replace ampersands and single quotes only. |
| 3067 | */ |
| 3068 | return apply_filters( 'clean_url', $good_protocol_url, $original_url, $_context ); |
| 3069 | } |
| 3070 | |
| 3071 | /** |
| 3072 | * Performs esc_url() for database usage. |
| 3073 | * |
| 3074 | * @since 2.8.0 |
| 3075 | * @uses esc_url() |
| 3076 | * |
| 3077 | * @param string $url The URL to be cleaned. |