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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 |
|---|---|
| 2878 | * Filters whether to treat the upload bits as an error. |
| 2879 | * |
| 2880 | * Returning a non-array from the filter will effectively short-circuit preparing the upload bits |
| 2881 | * and return that value instead. An error message should be returned as a string. |
| 2882 | * |
| 2883 | * @since 3.0.0 |
| 2884 | * |
| 2885 | * @param array|string $upload_bits_error An array of upload bits data, or error message to return. |
| 2886 | */ |
| 2887 | $upload_bits_error = apply_filters( |
| 2888 | 'wp_upload_bits', |
| 2889 | array( |
| 2890 | 'name' => $name, |
| 2891 | 'bits' => $bits, |
| 2892 | 'time' => $time, |
| 2893 | ) |
| 2894 | ); |
| 2895 | if ( ! is_array( $upload_bits_error ) ) { |
| 2896 | $upload['error'] = $upload_bits_error; |