Imagick::setImageCompression

(PECL imagick 2.0.0)

Imagick::setImageCompression设置图片压缩的类型

说明

bool Imagick::setImageCompression ( int $compression )

参数

compression

COMPRESSION 常量里的一种

返回值

成功时返回 TRUE

错误/异常

错误时抛出 ImagickException。

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snipes2083 [at] yahoo com
7 years ago
Above it says "One of the COMPRESSION constants" for the parameters.  For any of you that found this confusing, you can find a list of the constants here:

Predefined Constants
http://www.php.net/manual/en/imagick.constants.php

As an example for working with a jpeg image:

<?php
    $image
= 'jpeg_image.jpg';
   
$comression_type = Imagick::COMPRESSION_JPEG;
   
   
$im = new Imagick($image);
   
$im->setImageCompression($compression_type);
?>

This class does not actually compress the images but rather sets the compression type that is going to be used. 

If you would like to see how to compress the image see:
Imagick::setImageCompressionQuality
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