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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 |
|---|---|
| 2279 | |
| 2280 | if ( $real_mime && $real_mime != $type ) { |
| 2281 | /** |
| 2282 | * Filters the list mapping image mime types to their respective extensions. |
| 2283 | * |
| 2284 | * @since 3.0.0 |
| 2285 | * |
| 2286 | * @param array $mime_to_ext Array of image mime types and their matching extensions. |
| 2287 | */ |
| 2288 | $mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array( |
| 2289 | 'image/jpeg' => 'jpg', |
| 2290 | 'image/png' => 'png', |
| 2291 | 'image/gif' => 'gif', |
| 2292 | 'image/bmp' => 'bmp', |
| 2293 | 'image/tiff' => 'tif', |
| 2294 | ) ); |
| 2295 | |
| 2296 | // Replace whatever is after the last period in the filename with the correct extension |
| 2297 | if ( ! empty( $mime_to_ext[ $real_mime ] ) ) { |