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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 |
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2308 |
|
2309 | if ( $real_mime && $real_mime != $type ) { |
2310 | /** |
2311 | * Filters the list mapping image mime types to their respective extensions. |
2312 | * |
2313 | * @since 3.0.0 |
2314 | * |
2315 | * @param array $mime_to_ext Array of image mime types and their matching extensions. |
2316 | */ |
2317 | $mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array( |
2318 | 'image/jpeg' => 'jpg', |
2319 | 'image/png' => 'png', |
2320 | 'image/gif' => 'gif', |
2321 | 'image/bmp' => 'bmp', |
2322 | 'image/tiff' => 'tif', |
2323 | ) ); |
2324 |
|
2325 | // Replace whatever is after the last period in the filename with the correct extension |
2326 | if ( ! empty( $mime_to_ext[ $real_mime ] ) ) { |