Imagick
在线手册：中文 英文
PHP手册

Imagick::pingImage

(PECL imagick 2.0.0)

Imagick::pingImage — Fetch basic attributes about the image

说明

bool Imagick::pingImage ( string $filename )

This method can be used to query image width, height, size, and format without reading the whole image in to memory.

参数

filename

The filename to read the information from.

返回值

成功时返回 TRUE .

Imagick
在线手册：中文 英文
PHP手册
PHP手册 - N: Fetch basic attributes about the image

用户评论:

Eero Niemi (eero at eero dot info) (21-May-2008 03:12)

Actually the previous example causes file to be loaded twice on Imagick's stack, proper way to do this is:

<?php

$file = 'foo.jpg';
$image = new Imagick();
$image->pingImage($file);
$image_info = $image->identifyImage();

?>