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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 |
---|---|
4254 | /** |
4255 | * Filters a string cleaned and escaped for output as a URL. |
4256 | * |
4257 | * @since 2.3.0 |
4258 | * |
4259 | * @param string $good_protocol_url The cleaned URL to be returned. |
4260 | * @param string $original_url The URL prior to cleaning. |
4261 | * @param string $_context If 'display', replace ampersands and single quotes only. |
4262 | */ |
4263 | return apply_filters( 'clean_url', $good_protocol_url, $original_url, $_context ); |
4264 | } |
4265 |
|
4266 | /** |
4267 | * Performs esc_url() for database usage. |
4268 | * |
4269 | * @since 2.8.0 |
4270 | * |
4271 | * @param string $url The URL to be cleaned. |
4272 | * @param array $protocols An array of acceptable protocols. |