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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 |
|---|---|
| 2301 | $wp_filetype = wp_check_filetype( $name ); |
| 2302 | if ( !$wp_filetype['ext'] ) |
| 2303 | return array( 'error' => __( 'Invalid file type' ) ); |
| 2304 | |
| 2305 | $upload = wp_upload_dir( $time ); |
| 2306 | |
| 2307 | if ( $upload['error'] !== false ) |
| 2308 | return $upload; |
| 2309 | |
| 2310 | $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) ); |
| 2311 | if ( !is_array( $upload_bits_error ) ) { |
| 2312 | $upload[ 'error' ] = $upload_bits_error; |
| 2313 | return $upload; |
| 2314 | } |
| 2315 | |
| 2316 | $filename = wp_unique_filename( $upload['path'], $name ); |
| 2317 | |
| 2318 | $new_file = $upload['path'] . "/$filename"; |
| 2319 | if ( ! wp_mkdir_p( dirname( $new_file ) ) ) { |