Imagick::pingImageFile

(PECL imagick 2.0.0)

Imagick::pingImageFile — Get basic image attributes in a lightweight manner

说明

bool Imagick::pingImageFile ( resource $filehandle [, string $fileName ] )

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
 
 $fp  =  fopen ( "http://example.com/test.jpg" );

 
 $im  = new  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