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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 |
---|---|
2102 | // If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME |
2103 | if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) { |
2104 | /** |
2105 | * Filter the list mapping image mime types to their respective extensions. |
2106 | * |
2107 | * @since 3.0.0 |
2108 | * |
2109 | * @param array $mime_to_ext Array of image mime types and their matching extensions. |
2110 | */ |
2111 | $mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array( |
2112 | 'image/jpeg' => 'jpg', |
2113 | 'image/png' => 'png', |
2114 | 'image/gif' => 'gif', |
2115 | 'image/bmp' => 'bmp', |
2116 | 'image/tiff' => 'tif', |
2117 | ) ); |
2118 |
|
2119 | // Replace whatever is after the last period in the filename with the correct extension |
2120 | if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) { |