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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 |
|---|---|
| 1066 | if ( count( $parts ) <= 2 ) { |
| 1067 | /** |
| 1068 | * Filter a sanitized filename string. |
| 1069 | * |
| 1070 | * @since 2.8.0 |
| 1071 | * |
| 1072 | * @param string $filename Sanitized filename. |
| 1073 | * @param string $filename_raw The filename prior to sanitization. |
| 1074 | */ |
| 1075 | return apply_filters( 'sanitize_file_name', $filename, $filename_raw ); |
| 1076 | } |
| 1077 | |
| 1078 | // Process multiple extensions |
| 1079 | $filename = array_shift($parts); |
| 1080 | $extension = array_pop($parts); |
| 1081 | $mimes = get_allowed_mime_types(); |
| 1082 | |
| 1083 | /* |
| 1084 | * Loop over any intermediate extensions. Postfix them with a trailing underscore |
| Line | Code |
| 1096 | break; |
| 1097 | } |
| 1098 | } |
| 1099 | if ( !$allowed ) |
| 1100 | $filename .= '_'; |
| 1101 | } |
| 1102 | } |
| 1103 | $filename .= '.' . $extension; |
| 1104 | /** This filter is documented in wp-includes/formatting.php */ |
| 1105 | return apply_filters('sanitize_file_name', $filename, $filename_raw); |
| 1106 | } |
| 1107 | |
| 1108 | /** |
| 1109 | * Sanitizes a username, stripping out unsafe characters. |
| 1110 | * |
| 1111 | * Removes tags, octets, entities, and if strict is enabled, will only keep |
| 1112 | * alphanumeric, _, space, ., -, @. After sanitizing, it passes the username, |
| 1113 | * raw username (the username in the parameter), and the value of $strict as |
| 1114 | * parameters for the 'sanitize_user' filter. |