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使用curl-PHP从url保存图像

php image curl

使用curl-PHP从url保存图像,php,image,curl,Php,Image,Curl,我需要使用CURL保存url中的图像，并将其保存到服务器上的文件夹中。我一直在和这个密码搏斗，但毫无结果。理想情况下，我希望抓取图像并将其保存为“photo1”或其他内容。救命啊 function GetImageFromUrl($link) { $ch = curl_init(); curl_setopt($ch, CURLOPT_POST, 0); curl_setopt($ch,CURLOPT_URL,$link); curl_se

我需要使用CURL保存url中的图像，并将其保存到服务器上的文件夹中。我一直在和这个密码搏斗，但毫无结果。理想情况下，我希望抓取图像并将其保存为“photo1”或其他内容。救命啊

    function GetImageFromUrl($link)

    {

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_POST, 0);

    curl_setopt($ch,CURLOPT_URL,$link);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    $result=curl_exec($ch);

    curl_close($ch);

    return $result;

    }

    $sourcecode = GetImageFromUrl($iticon);

    $savefile = fopen(' /img/uploads/' . $iconfilename, 'w');
    fwrite($savefile, $sourcecode);
    fclose($savefile);
试试这个：

function grab_image($url,$saveto){
    $ch = curl_init ($url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
    $raw=curl_exec($ch);
    curl_close ($ch);
    if(file_exists($saveto)){
        unlink($saveto);
    }
    $fp = fopen($saveto,'x');
    fwrite($fp, $raw);
    fclose($fp);
}
并确保在php.ini中allow_url_fopen是enable

选项#1

您可以使用
CURLOPT_FILE
选项将文件直接显示给curl进行下载，而不是将二进制/原始数据拾取到变量中然后写入

// takes URL of image and Path for the image as parameter
function download_image2($image_url){
    $ch = curl_init($image_url);
    // curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // enable if you want
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT, 1000);      // some large value to allow curl to run for a long time
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');
    curl_setopt($ch, CURLOPT_WRITEFUNCTION, "curl_callback");
    // curl_setopt($ch, CURLOPT_VERBOSE, true);   // Enable this line to see debug prints
    curl_exec($ch);

    curl_close($ch);                              // closing curl handle
}

/** callback function for curl */
function curl_callback($ch, $bytes){
    global $fp;
    $len = fwrite($fp, $bytes);
    // if you want, you can use any progress printing here
    return $len;
}
以下是函数：

// takes URL of image and Path for the image as parameter
function download_image1($image_url, $image_file){
    $fp = fopen ($image_file, 'w+');              // open file handle

    $ch = curl_init($image_url);
    // curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // enable if you want
    curl_setopt($ch, CURLOPT_FILE, $fp);          // output to file
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT, 1000);      // some large value to allow curl to run for a long time
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');
    // curl_setopt($ch, CURLOPT_VERBOSE, true);   // Enable this line to see debug prints
    curl_exec($ch);

    curl_close($ch);                              // closing curl handle
    fclose($fp);                                  // closing file handle
}

// test the download function
$image_file = "local_image2.jpg";
$fp = fopen ($image_file, 'w+');              // open file handle
download_image2("http://www.gravatar.com/avatar/10773ae6687b55736e171c038b4228d2");
fclose($fp);                                  // closing file handle
以下是您应该如何称呼它：

// test the download function
download_image1("http://www.gravatar.com/avatar/10773ae6687b55736e171c038b4228d2", "local_image1.jpg");
选项2

现在，如果您想下载一个非常大的文件，，上述功能可能并不方便。这次您可以使用下面的函数来处理一个大文件。此外，如果需要，还可以打印进度（以
%
或任何其他格式）。下面的函数是使用
回调
函数实现的，该函数在下载过程中将一大块数据写入文件

// takes URL of image and Path for the image as parameter
function download_image2($image_url){
    $ch = curl_init($image_url);
    // curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // enable if you want
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT, 1000);      // some large value to allow curl to run for a long time
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');
    curl_setopt($ch, CURLOPT_WRITEFUNCTION, "curl_callback");
    // curl_setopt($ch, CURLOPT_VERBOSE, true);   // Enable this line to see debug prints
    curl_exec($ch);

    curl_close($ch);                              // closing curl handle
}

/** callback function for curl */
function curl_callback($ch, $bytes){
    global $fp;
    $len = fwrite($fp, $bytes);
    // if you want, you can use any progress printing here
    return $len;
}
下面是如何调用此函数：

// takes URL of image and Path for the image as parameter
function download_image1($image_url, $image_file){
    $fp = fopen ($image_file, 'w+');              // open file handle

    $ch = curl_init($image_url);
    // curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // enable if you want
    curl_setopt($ch, CURLOPT_FILE, $fp);          // output to file
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT, 1000);      // some large value to allow curl to run for a long time
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');
    // curl_setopt($ch, CURLOPT_VERBOSE, true);   // Enable this line to see debug prints
    curl_exec($ch);

    curl_close($ch);                              // closing curl handle
    fclose($fp);                                  // closing file handle
}

// test the download function
$image_file = "local_image2.jpg";
$fp = fopen ($image_file, 'w+');              // open file handle
download_image2("http://www.gravatar.com/avatar/10773ae6687b55736e171c038b4228d2");
fclose($fp);                                  // closing file handle
Komang answer的改进版本（添加referer和user agent，检查是否可以写入文件），如果可以，则返回true，如果出现错误，则返回false：

public function downloadImage($url,$filename){
    if(file_exists($filename)){
        @unlink($filename);
    }
    $fp = fopen($filename,'w');
    if($fp){
        $ch = curl_init ($url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
        $result = parse_url($url);
        curl_setopt($ch, CURLOPT_REFERER, $result['scheme'].'://'.$result['host']);
        curl_setopt($ch, CURLOPT_USERAGENT,'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0');
        $raw=curl_exec($ch);
        curl_close ($ch);
        if($raw){
            fwrite($fp, $raw);
        }
        fclose($fp);
        if(!$raw){
            @unlink($filename);
            return false;
        }
        return true;
    }
    return false;
}
这是最容易实现的

function downloadFile($url, $path)
{
    $newfname = $path;
    $file = fopen($url, 'rb');
    if ($file) {
        $newf = fopen($newfname, 'wb');
        if ($newf) {
            while (!feof($file)) {
                fwrite($newf, fread($file, 1024 * 8), 1024 * 8);
            }
        }
    }
    if ($file) {
        fclose($file);
    }
    if ($newf) {
        fclose($newf);
    }
}
如果要从https下载图像：

$output_filename = 'output.png';
$host = "https://.../source.png"; // <-- Source image url (FIX THIS)
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $host);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_AUTOREFERER, false);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); // <-- don't forget this
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); // <-- and this
$result = curl_exec($ch);
curl_close($ch);
$fp = fopen($output_filename, 'wb');
fwrite($fp, $result);
fclose($fp);

$output_filename='output.png'；

$host=”https://.../source.png"; // 谢谢我会继续尝试这个方法，看看是否有效。请记住，编码良好的网站会寻找用户代理。每个浏览器、平板电脑或手机都会有一个用户代理！如果您仍然无法获取图像，很可能是因为检测到用户代理，请添加此<代码>curl_setopt（$ch，CURLOPT_USERAGENT，'MyImage Collector+http://www.yourdomainname/mybot.html');或欺骗一个真实的
curl_setopt（$ch，CURLOPT_USERAGENT，'Mozilla/5.0（Windows；U；windowsnt 5.1；en-US；rv:1.8.1.13）Gecko/20080311 Firefox/2.0.0.13'）像这样保存图像时是否有任何文件大小限制？PHP配置中的文件上载限制是否会影响此设置？“确保PHP.ini中的allow_url_fopen为enable”我们需要此设置吗？您真的应该为“unlink”函数添加一个警告-如果您不小心，这将非常危险。Noobs小心
CURLOPT_RETURNTRANSFER
首先将整个文件读取为php变量。它的速度较慢，并且可以在大文件上中断。改为使用
CURLOPT_file
传递文件指针。您的代码解决了请求的URL返回的错误：503服务不可用问题。谢谢你，先生，祝你今天愉快。