dongxiaoxing3058 2015-06-13 13:45
浏览 100
已采纳

如何使用PHP从URL调整图像大小?

I'm receiving Images from URLs and I would like to save these images into a new directory, in three different sizes. I'm already getting the URLs here, now I just need a way to resize each image, with a specific height and width.

I dont want to resize uploaded images, only Images from a specific URL.

My code:

$content = file_get_contents('http://www.joomlaworks.net/images/demos/galleries/abstract/7.jpg');
$name = "http://www.joomlaworks.net/images/demos/galleries/abstract/7.jpg";
$parts = explode('.', $name);
$new_url = rand(0, pow(10, 5)) . '_' . time() . '.' . $parts[count($parts) - 1];
file_put_contents(DIRECTORY.'/' . $new_url , $content);

How can I do that? Thanks.

  • 写回答

1条回答 默认 最新

  • doudi7570 2015-06-13 14:31
    关注

    here is the solution based on imagecopyresampled (GD library) http://php.net/manual/en/function.imagecopyresampled.php

    $content = file_get_contents('http://www.joomlaworks.net/images/demos/galleries/abstract/7.jpg');
    $name = "http://www.joomlaworks.net/images/demos/galleries/abstract/7.jpg";
    $parts = explode('.', $name);
    $new_url = rand(0, pow(10, 5)) . '_' . time() . '.' . $parts[count($parts) - 1];
    file_put_contents(DIRECTORY.'/' . $new_url , $content);
    
    resizeImage($new_url, DIRECTORY.'/1_' . $new_url, 100, 100);
    resizeImage($new_url, DIRECTORY.'/2_' . $new_url, 200, 200);
    resizeImage($new_url, DIRECTORY.'/3_' . $new_url, 300, 300);
    
    function resizeImage($source, $dest, $new_width, $new_height)
    {
        list($width, $height) = getimagesize($source);
        $image_p = imagecreatetruecolor($new_width, $new_height);
        $image = imagecreatefromjpeg($source);
        imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
        imagejpeg($image_p, $dest, 100);
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥250 雷电模拟器内存穿透、寻基址和特征码的教学
  • ¥200 比特币ord程序wallet_constructor.rs文件支持一次性铸造1000个代币,并将它们分配到40个UTXO上(每个UTXO上分配25个代币),并设置找零地址
  • ¥15 关于Java的学习问题
  • ¥15 如何使用chatgpt完成文本分类任务?
  • ¥15 已知速度v关于位置s的等式,怎么转化为已知位置求速度v的等式
  • ¥15 我有个餐饮系统,用wampserver把环境配置好了,但是后端的网页却进去,是为什么,能不能帮远程一下?
  • ¥15 R运行没有名称为"species"的插槽对于此对象类"SDMmodelCV"
  • ¥20 基于决策树的数字信号处理,2ask 2psk 2fsk的代码,检查下报错的原因
  • ¥15 wincc已组态的变量过多
  • ¥60 如图:直线与椭圆X轴平行,求直线与椭圆任意一点的相切坐标计算公式