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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 |
|---|---|
| 2034 | * Filter whether to treat the upload bits as an error. |
| 2035 | * |
| 2036 | * Passing a non-array to the filter will effectively short-circuit preparing |
| 2037 | * the upload bits, returning that value instead. |
| 2038 | * |
| 2039 | * @since 3.0.0 |
| 2040 | * |
| 2041 | * @param mixed $upload_bits_error An array of upload bits data, or a non-array error to return. |
| 2042 | */ |
| 2043 | $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) ); |
| 2044 | if ( !is_array( $upload_bits_error ) ) { |
| 2045 | $upload[ 'error' ] = $upload_bits_error; |
| 2046 | return $upload; |
| 2047 | } |
| 2048 | |
| 2049 | $filename = wp_unique_filename( $upload['path'], $name ); |
| 2050 | |
| 2051 | $new_file = $upload['path'] . "/$filename"; |
| 2052 | if ( ! wp_mkdir_p( dirname( $new_file ) ) ) { |