Question

是否可以使用cURL显示图像？我想显示没有水印的图像，所以我需要通过用户代理传递它。我试过了，但它显示了一些编码文本。

function gets($url){
    $userAgent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_VERBOSE, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
    $output = curl_exec($ch);
    curl_close($ch);
}
$img = 'https://upload.wikimedia.org/wikipedia/commons/thumb/4/46/Bear_Alaska_%283%29.jpg/220px-Bear_Alaska_%283%29.jpg';
gets($img)

Answer 1

您必须将标题设置为如下图所示：

header('Content-type: image/jpeg');

如果您可以应用以下正确的图片类型：

图像/ JPEG
图像/ PNG
图像/ GIF

因此，您的代码可以更新如下：

function gets($url){
    $userAgent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_VERBOSE, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
    $output = curl_exec($ch);
    curl_close($ch);
    return $output;
}
$img = 'https://upload.wikimedia.org/wikipedia/commons/thumb/4/46/Bear_Alaska_%283%29.jpg/220px-Bear_Alaska_%283%29.jpg';
header('Content-type: image/jpeg');
echo gets($img);

Answer 2

由于您的curl仅返回图像内容，因此您必须更改标题值。请尝试以下代码：

<?php
function gets($url){
    $userAgent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_VERBOSE, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
    $filename = basename($url);
    $file_extension = strtolower(substr(strrchr($filename,"."),1));

    switch( $file_extension ) {
        case "gif": $ctype="image/gif"; break;
        case "png": $ctype="image/png"; break;
        case "jpeg":
        case "jpg": $ctype="image/jpeg"; break;
        default:
    }

    header('Content-type: ' . $ctype);
    echo $output = curl_exec($ch);
    curl_close($ch);
}
$img = 'https://upload.wikimedia.org/wikipedia/commons/thumb/4/46/Bear_Alaska_%283%29.jpg/220px-Bear_Alaska_%283%29.jpg';
gets($img);

用cURL显示图像

2 个答案: