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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 |
|---|---|
| 2528 | // Redefine the extension / MIME |
| 2529 | $wp_filetype = wp_check_filetype( $new_filename, $mimes ); |
| 2530 | extract( $wp_filetype ); |
| 2531 | } |
| 2532 | } |
| 2533 | } |
| 2534 | |
| 2535 | // Let plugins try and validate other types of files |
| 2536 | // Should return an array in the style of array( 'ext' => $ext, 'type' => $type, 'proper_filename' => $proper_filename ) |
| 2537 | return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes ); |
| 2538 | } |
| 2539 | |
| 2540 | /** |
| 2541 | * Retrieve list of allowed mime types and file extensions. |
| 2542 | * |
| 2543 | * @since 2.8.6 |
| 2544 | * |
| 2545 | * @return array Array of mime types keyed by the file extension regex corresponding to those types. |
| 2546 | */ |