Gmagick::scaleimage()

(PECL gmagick >= Unknown)

Scales the size of an image

说明

publicGmagick::scaleimage(int $width,int $height[,bool $fit= FALSE]): Gmagick

Scales the size of an image to the given dimensions. The other parameter will be calculated if 0 is passed as either param.

参数

$width

The number of columns in the scaled image.

$height

The number of rows in the scaled image.

返回值

The Gmagick object on success.

错误／异常

错误时抛出GmagickException。

CORRECTION
Replace
echo 'img src="data:image/jpeg:base64,'.base64_encode($image).'">';
With 
echo '<img src="data:image/jpeg:base64,'.base64_encode($image).'">';

Simple method to load an image from file, resize and display without writing to disk.
tested on jpg, gif and bmp
<?php
$image= new Gmagick( "yourimage.jpg");
$image->scaleimage(300,0);
echo 'img src="data:image/jpeg:base64,'.base64_encode($image).'">';
$image->destroy();
?>