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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 |
|---|---|
| 2033 | if ( count( $parts ) <= 2 ) { |
| 2034 | /** |
| 2035 | * Filters a sanitized filename string. |
| 2036 | * |
| 2037 | * @since 2.8.0 |
| 2038 | * |
| 2039 | * @param string $filename Sanitized filename. |
| 2040 | * @param string $filename_raw The filename prior to sanitization. |
| 2041 | */ |
| 2042 | return apply_filters( 'sanitize_file_name', $filename, $filename_raw ); |
| 2043 | } |
| 2044 | |
| 2045 | // Process multiple extensions |
| 2046 | $filename = array_shift( $parts ); |
| 2047 | $extension = array_pop( $parts ); |
| 2048 | $mimes = get_allowed_mime_types(); |
| 2049 | |
| 2050 | /* |
| 2051 | * Loop over any intermediate extensions. Postfix them with a trailing underscore |
| Line | Code |
| 2064 | } |
| 2065 | } |
| 2066 | if ( ! $allowed ) { |
| 2067 | $filename .= '_'; |
| 2068 | } |
| 2069 | } |
| 2070 | } |
| 2071 | $filename .= '.' . $extension; |
| 2072 | /** This filter is documented in wp-includes/formatting.php */ |
| 2073 | return apply_filters( 'sanitize_file_name', $filename, $filename_raw ); |
| 2074 | } |
| 2075 | |
| 2076 | /** |
| 2077 | * Sanitizes a username, stripping out unsafe characters. |
| 2078 | * |
| 2079 | * Removes tags, octets, entities, and if strict is enabled, will only keep |
| 2080 | * alphanumeric, _, space, ., -, @. After sanitizing, it passes the username, |
| 2081 | * raw username (the username in the parameter), and the value of $strict as |
| 2082 | * parameters for the {@see 'sanitize_user'} filter. |