(PECL imagick 2, PECL imagick 3)
Imagick::pingImageBlob — Quickly fetch attributes
This method can be used to query image width, height, size, and format without reading the whole image to memory. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。
image
A string containing the image.
成功时返回 true
。
示例 #1 Using Imagick::pingImageBlob()
Pinging an image from a string
<?php
$image = file_get_contents("test.jpg");
$im = new Imagick();
$im->pingImageBlob($image);
echo $im->getImageWidth() . 'x' . $im->getImageHeight();
?>