Php/docs/imagick.pingimageblob
来自菜鸟教程
Imagick::pingImageBlob
(PECL imagick 2, PECL imagick 3)
Imagick::pingImageBlob — Quickly fetch attributes
说明
public 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
