PHP根据图片url下载图片到本地的两种方法

方法一:

file_put_contents(Yii::getAlias('@backend/web/upload/123.jpg'), file_get_contents('https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=alkshduhalskfjasd));

方法二:

$url = 'https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=alkshduhalskfjasd;

$curl = curl_init($url);

curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);

$imageData = curl_exec($curl);

curl_close($curl);

$tp = fopen(Yii::$app->basePath . "/runtime/123.jpg","a");

fwrite($tp, $imageData);

fclose($tp);