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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 |
|---|---|
| 2048 | |
| 2049 | /** |
| 2050 | * Filters the list of characters to remove from a filename. |
| 2051 | * |
| 2052 | * @since 2.8.0 |
| 2053 | * |
| 2054 | * @param string[] $special_chars Array of characters to remove. |
| 2055 | * @param string $filename_raw The original filename to be sanitized. |
| 2056 | */ |
| 2057 | $special_chars = apply_filters( 'sanitize_file_name_chars', $special_chars, $filename_raw ); |
| 2058 | |
| 2059 | $filename = str_replace( $special_chars, '', $filename ); |
| 2060 | $filename = str_replace( array( '%20', '+' ), '-', $filename ); |
| 2061 | $filename = preg_replace( '/\.{2,}/', '.', $filename ); |
| 2062 | $filename = preg_replace( '/[\r\n\t -]+/', '-', $filename ); |
| 2063 | $filename = trim( $filename, '.-_' ); |
| 2064 | |
| 2065 | if ( ! str_contains( $filename, '.' ) ) { |
| 2066 | $mime_types = wp_get_mime_types(); |