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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 |
---|---|
2678 | * Filters whether to treat the upload bits as an error. |
2679 | * |
2680 | * Returning a non-array from the filter will effectively short-circuit preparing the upload bits |
2681 | * and return that value instead. An error message should be returned as a string. |
2682 | * |
2683 | * @since 3.0.0 |
2684 | * |
2685 | * @param array|string $upload_bits_error An array of upload bits data, or error message to return. |
2686 | */ |
2687 | $upload_bits_error = apply_filters( |
2688 | 'wp_upload_bits', |
2689 | array( |
2690 | 'name' => $name, |
2691 | 'bits' => $bits, |
2692 | 'time' => $time, |
2693 | ) |
2694 | ); |
2695 | if ( ! is_array( $upload_bits_error ) ) { |
2696 | $upload['error'] = $upload_bits_error; |