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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 |
|---|---|
| 1308 | $special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0)); |
| 1309 | /** |
| 1310 | * Filter the list of characters to remove from a filename. |
| 1311 | * |
| 1312 | * @since 2.8.0 |
| 1313 | * |
| 1314 | * @param array $special_chars Characters to remove. |
| 1315 | * @param string $filename_raw Filename as it was passed into sanitize_file_name(). |
| 1316 | */ |
| 1317 | $special_chars = apply_filters( 'sanitize_file_name_chars', $special_chars, $filename_raw ); |
| 1318 | $filename = preg_replace( "#\x{00a0}#siu", ' ', $filename ); |
| 1319 | $filename = str_replace( $special_chars, '', $filename ); |
| 1320 | $filename = str_replace( array( '%20', '+' ), '-', $filename ); |
| 1321 | $filename = preg_replace( '/[\r\n\t -]+/', '-', $filename ); |
| 1322 | $filename = trim( $filename, '.-_' ); |
| 1323 | |
| 1324 | // Split the filename into a base and extension[s] |
| 1325 | $parts = explode('.', $filename); |
| 1326 | |