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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 |
|---|---|
| 1944 | * Filter whether to treat the upload bits as an error. |
| 1945 | * |
| 1946 | * Passing a non-array to the filter will effectively short-circuit preparing |
| 1947 | * the upload bits, returning that value instead. |
| 1948 | * |
| 1949 | * @since 3.0.0 |
| 1950 | * |
| 1951 | * @param mixed $upload_bits_error An array of upload bits data, or a non-array error to return. |
| 1952 | */ |
| 1953 | $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) ); |
| 1954 | if ( !is_array( $upload_bits_error ) ) { |
| 1955 | $upload[ 'error' ] = $upload_bits_error; |
| 1956 | return $upload; |
| 1957 | } |
| 1958 | |
| 1959 | $filename = wp_unique_filename( $upload['path'], $name ); |
| 1960 | |
| 1961 | $new_file = $upload['path'] . "/$filename"; |
| 1962 | if ( ! wp_mkdir_p( dirname( $new_file ) ) ) { |