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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 2062 | } |
| 2063 | } |
| 2064 | |
| 2065 | // Split the filename into a base and extension[s]. |
| 2066 | $parts = explode( '.', $filename ); |
| 2067 | |
| 2068 | // Return if only one extension. |
| 2069 | if ( count( $parts ) <= 2 ) { |
| 2070 | /** This filter is documented in wp-includes/formatting.php */ |
| 2071 | return apply_filters( 'sanitize_file_name', $filename, $filename_raw ); |
| 2072 | } |
| 2073 | |
| 2074 | // Process multiple extensions. |
| 2075 | $filename = array_shift( $parts ); |
| 2076 | $extension = array_pop( $parts ); |
| 2077 | $mimes = get_allowed_mime_types(); |
| 2078 | |
| 2079 | /* |
| 2080 | * Loop over any intermediate extensions. Postfix them with a trailing underscore |
| Line | Code |
| 2102 | |
| 2103 | /** |
| 2104 | * Filters a sanitized filename string. |
| 2105 | * |
| 2106 | * @since 2.8.0 |
| 2107 | * |
| 2108 | * @param string $filename Sanitized filename. |
| 2109 | * @param string $filename_raw The filename prior to sanitization. |
| 2110 | */ |
| 2111 | return apply_filters( 'sanitize_file_name', $filename, $filename_raw ); |
| 2112 | } |
| 2113 | |
| 2114 | /** |
| 2115 | * Sanitizes a username, stripping out unsafe characters. |
| 2116 | * |
| 2117 | * Removes tags, percent-encoded characters, HTML entities, and if strict is enabled, |
| 2118 | * will only keep alphanumeric, _, space, ., -, @. After sanitizing, it passes the username, |
| 2119 | * raw username (the username in the parameter), and the value of $strict as parameters |
| 2120 | * for the {@see 'sanitize_user'} filter. |