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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 |
|---|---|
| 2025 | |
| 2026 | /** |
| 2027 | * Filters the list of characters to remove from a filename. |
| 2028 | * |
| 2029 | * @since 2.8.0 |
| 2030 | * |
| 2031 | * @param string[] $special_chars Array of characters to remove. |
| 2032 | * @param string $filename_raw The original filename to be sanitized. |
| 2033 | */ |
| 2034 | $special_chars = apply_filters( 'sanitize_file_name_chars', $special_chars, $filename_raw ); |
| 2035 | |
| 2036 | $filename = str_replace( $special_chars, '', $filename ); |
| 2037 | $filename = str_replace( array( '%20', '+' ), '-', $filename ); |
| 2038 | $filename = preg_replace( '/[\r\n\t -]+/', '-', $filename ); |
| 2039 | $filename = trim( $filename, '.-_' ); |
| 2040 | |
| 2041 | if ( false === strpos( $filename, '.' ) ) { |
| 2042 | $mime_types = wp_get_mime_types(); |
| 2043 | $filetype = wp_check_filetype( 'test.' . $filename, $mime_types ); |