PHP站点外链图片无法显示怎么办？

在网站用了外部图片时，部分图片可能有防外链功能，导致图片无法显示。根据以下方法解决：

在根目录创建img.php文件

将以下代码写入文件中

<?php
    $url = $_GET["url"];
    $url = str_replace("https:/","https://",$url);
$dir = pathinfo($url);   //获取图片信息
    $host = $dir['dirname'];  //图片dirname
    $refer = $host.'/';
    $ch = curl_init($url);
    curl_setopt ($ch, CURLOPT_REFERER, $refer);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
    $data = curl_exec($ch);
    curl_close($ch);
    $ext = strtolower(substr(strrchr($img,'.'),1,10));
    $types = array(
                'gif'=>'image/gif',
                'jpeg'=>'image/jpeg',
                'jpg'=>'image/jpeg',
                'jpe'=>'image/jpeg',
                'png'=>'image/png',
    );
    $type = $types[$ext] ? $types[$ext] : 'image/jpeg';
    header("Content-type: ".$type);
    echo $data;

然后外链图片地址前面加上/img.php?url=图片地址

就可以解决了