Imagick::pingImageFile
(PECL imagick 2.0.0)
Imagick::pingImageFile — Get basic image attributes in a lightweight manner
说明
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");
/* 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
