Imagick::getImageCompression

(PECL imagick 3 >= 3.3.0)

Imagick::getImageCompression — 現在の画像の圧縮形式を取得する

説明

public Imagick::getImageCompression(): int

現在の画像の圧縮形式を取得します。

パラメータ

この関数にはパラメータはありません。

戻り値

圧縮形式を表す定数を返します。

Found A Problem?

Learn How To Improve This Page • Submit a Pull Request • Report a Bug

＋add a note

User Contributed Notes 3 notes

down

Mondragon ¶

4 years ago

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_UNDEFINED
COMPRESSION_NO
COMPRESSION_BZIP
COMPRESSION_FAX
COMPRESSION_GROUP4
COMPRESSION_JPEG
COMPRESSION_JPEG2000
COMPRESSION_LOSSLESSJPEG
COMPRESSION_LZW
COMPRESSION_RLE
COMPRESSION_ZIP
COMPRESSION_DXT1
COMPRESSION_DXT3
COMPRESSION_DXT5
COMPRESSION_ZIPS
COMPRESSION_PIZ
COMPRESSION_PXR24
COMPRESSION_B44
COMPRESSION_B44A
COMPRESSION_LZMA
COMPRESSION_JBIG1
COMPRESSION_JBIG2

The numbers for which those constants stand differ by version. So always use the constants.