Php/docs/imagick.pingimagefile
来自菜鸟教程
Imagick::pingImageFile
(PECL imagick 2, PECL imagick 3)
Imagick::pingImageFile — Get basic image attributes in a lightweight manner
说明
public Imagick::pingImageFile
( resource $filehandle
[, string $fileName
] ) : bool
This method can be used to query image width, height, size, and format without reading the whole image to memory. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。
参数
filehandle- An open filehandle to the image.
fileName- Optional filename for this image.
返回值
成功时返回 true。
范例
Example #1 Using Imagick::pingImageFile()
Opening a remote location
<?php/* fopen a remote location */$fp = fopen("http://example.com/test.jpg%22);/* create new imagick object */$im = new Imagick();/* pass the handle to imagick */$im->pingImageFile($fp);?>
参见
- Imagick::pingImage() - Fetch basic attributes about the image
- Imagick::pingImageBlob() - Quickly fetch attributes
- 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
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