Imagick::getImageCompression

Example use:$im = new Imagick("mypicture.jpg");$ctype = $im->getImageCompression();if($ctype == Imagick::COMPRESSION_ZIP) echo "PNG file!";if($ctype == Imagick::COMPRESSION_JPEG) echo "JPG file!";if($ctype == Imagick::COMPRESSION_LZW) echo "GIF file!";All options:COMPRESSION_UNDEFINEDCOMPRESSION_NOCOMPRESSION_BZIPCOMPRESSION_FAXCOMPRESSION_GROUP4COMPRESSION_JPEGCOMPRESSION_JPEG2000COMPRESSION_LOSSLESSJPEGCOMPRESSION_LZWCOMPRESSION_RLECOMPRESSION_ZIPCOMPRESSION_DXT1COMPRESSION_DXT3COMPRESSION_DXT5COMPRESSION_ZIPSCOMPRESSION_PIZCOMPRESSION_PXR24COMPRESSION_B44COMPRESSION_B44ACOMPRESSION_LZMACOMPRESSION_JBIG1COMPRESSION_JBIG2The numbers for which those constants stand differ by version. So always use the constants.

This function is undefined. You must use getImageCompressionQuality() instead.

This function is added in version 3.3.0 and above