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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 |
|---|---|
| 3944 | $sani_mime_type = preg_replace( '/[^-+*.a-zA-Z0-9\/]/', '', $mime_type ); |
| 3945 | /** |
| 3946 | * Filter a mime type following sanitization. |
| 3947 | * |
| 3948 | * @since 3.1.3 |
| 3949 | * |
| 3950 | * @param string $sani_mime_type The sanitized mime type. |
| 3951 | * @param string $mime_type The mime type prior to sanitization. |
| 3952 | */ |
| 3953 | return apply_filters( 'sanitize_mime_type', $sani_mime_type, $mime_type ); |
| 3954 | } |
| 3955 | |
| 3956 | /** |
| 3957 | * Sanitize space or carriage return separated URLs that are used to send trackbacks. |
| 3958 | * |
| 3959 | * @since 3.4.0 |
| 3960 | * |
| 3961 | * @param string $to_ping Space or carriage return separated URLs |
| 3962 | * @return string URLs starting with the http or https protocol, separated by a carriage return. |