The Imagick class
PHP 手册

Imagick::pingImageBlob

(PECL imagick 2.0.0)

Imagick::pingImageBlobQuickly fetch attributes

说明

bool Imagick::pingImageBlob ( string $image )

This method can be used to query image width, height, size, and format without reading the whole image to memory. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.

参数

image

A string containing the image.

返回值

Returns TRUE on success.

范例

Example #1 Using Imagick::pingImageBlob()

Pinging an image from a string

<?php
/* read image contents */
$image file_get_contents("test.jpg");

/* create new imagick object */
$im = new Imagick();

/* pass the string to the imagick object */
$im->pingImageBlob($image);

/* output image width and height */
echo $im->getImageWidth() . 'x' $im->getImageHeight();
?>

参见


The Imagick class
PHP 手册