# Imagick::setCompressionQuality

(PECL imagick 2, PECL imagick 3)

Imagick::setCompressionQuality — Sets the object's default compression quality

### 说明

public Imagick::setCompressionQuality(int `$quality`): bool

Sets the object's default compression quality.

警告

This method only works for new images e.g. those created through Imagick::newPseudoImage. For existing images you should use Imagick::setImageCompressionQuality().

### 参数

`quality`

  An int between 1 and 100, 1 = high compression, 100 low compression.

### 返回值

成功时返回 `true`。

### 示例

示例 #1 Imagick::setCompressionQuality()

`<?php
function setCompressionQuality($imagePath, $quality) {
$backgroundImagick = new \Imagick(realpath($imagePath));
$imagick = new \Imagick();
$imagick->setCompressionQuality($quality);
$imagick->newPseudoImage(
$backgroundImagick->getImageWidth(),
$backgroundImagick->getImageHeight(),
'canvas:white'
);
$imagick->compositeImage(
$backgroundImagick,
\Imagick::COMPOSITE_ATOP,
0,
0
);
$imagick->setFormat("jpg");
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>`
`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open