Imagick::pingImageFile()

(PECL imagick 2.0.0)

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