Imagick::pingImageBlob()

(PECL imagick 2.0.0)

Quickly fetch attributes

说明

Imagick::pingImageBlob(string $image): bool

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。

参数

$image

A string containing the image.

返回值

成功时返回TRUE。

范例

Example #1 Using Imagick::pingImageBlob()

Pinging an image from a string

<?php
/* read image contents */
$image = file_get_contents("test.jpg");
/* create new imagick object */
$im = new Imagick();
/* pass the string to the imagick object */
$im->pingImageBlob($image);
/* output image width and height */
echo $im->getImageWidth() . 'x' . $im->getImageHeight();
?>

参见

• Imagick::pingImage() Fetch basic attributes about the image
• Imagick::pingImageFile() Get basic image attributes in a lightweight manner
• Imagick::readImage() Reads image from filename
• Imagick::readImageBlob() 从二进制字符串里读取图片
• Imagick::readImageFile() Reads image from open filehandle