PHP下载远程图片至本地

今天用到下载微信文章里的素材到服务器本地，写下以下方法，以做记录

	//下载远程图片至本地
	function downloadImageFromWeixin($url)
	{
	    $ch = curl_init($url);
	    curl_setopt($ch, CURLOPT_HEADER, 0);
	    curl_setopt($ch, CURLOPT_NOBODY, 0); // 只取body头
	    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	    $package = curl_exec($ch);
	    $httpinfo = curl_getinfo($ch);
	    curl_close($ch);
	    $imageAll = array_merge(array(
	    	'imgBody' => $package
	    ), $httpinfo);
	    return saveImages($imageAll);
	}
	// 保存图像
	function saveImages($imageAll,$file="",$path="Upload/wechat/images/"){
		path_exists($path);　　//保存地址目录查询，该方法在上篇文章有写https://www.cnblogs.com/lhm166/articles/14543486.html
		$file = $file?:uniqid().rand(1000,9999);
	    if ($imageAll['content_type'] == 'image/gif') {
	        file_put_contents($path.$file.'.gif', $imageAll["imgBody"]);
	        return '/'.$path.$file.'.gif';
	    }elseif($imageAll['content_type'] == 'image/png'){
	    	file_put_contents($path.$file.'.png', $imageAll["imgBody"]);
	    	return '/'.$path.$file.'.png';
	    } elseif ($imageAll['content_type'] == 'image/webp') {
	        file_put_contents($path.$file.'.webp', $imageAll["imgBody"]);
	        $im = imagecreatefromwebp($path.$file.'.webp');
	        imagejpeg($im, $path.$file.'.jpg', 100);
	        imagedestroy($im);
	        return '/'.$path.$file.'.jpg';
	    }elseif ($imageAll['content_type'] == 'image/jpeg') {
	    	file_put_contents($path.$file.'.jpeg', $imageAll["imgBody"]);
	    	return '/'.$path.$file.'.jpeg';
	    
	    }elseif ($imageAll['content_type'] == 'image/jpg') {
	    	file_put_contents($path.$file.'.jpeg', $imageAll["imgBody"]);
	    	return $path.$file.'.jpg';
	    }
	}