在PHP中裁剪图像 [英] Cropping image in PHP

问题描述

我想在PHP中裁剪图像并保存文件。我知道你应该使用GD库，但我不知道如何。有什么想法？

I'd like crop an image in PHP and save the file. I know your supposed to use the GD library but i'm not sure how. Any ideas?

谢谢

推荐答案

你可以用 imagecopy 裁剪图像的必需部分。命令如下：

You could use imagecopy to crop a required part of an image. The command goes like this:

imagecopy  ( 
    resource $dst_im - the image object ,
    resource $src_im - destination image ,
    int $dst_x - x coordinate in the destination image (use 0) , 
    int $dst_y - y coordinate in the destination image (use 0) , 
    int $src_x - x coordinate in the source image you want to crop , 
    int $src_y - y coordinate in the source image you want to crop , 
    int $src_w - crop width ,
    int $src_h - crop height 
)

来自 PHP.net - 从源图像裁剪80x40像素图像

Code from PHP.net - a 80x40 px image is cropped from a source image

<?php
// Create image instances
$src = imagecreatefromgif('php.gif');
$dest = imagecreatetruecolor(80, 40);

// Copy
imagecopy($dest, $src, 0, 0, 20, 13, 80, 40);

// Output and free from memory
header('Content-Type: image/gif');
imagegif($dest);

imagedestroy($dest);
imagedestroy($src);
?>

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