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

示例 #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

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