php 抓取网页生成图片(图片转base643 )

　　php 抓取网页生成图片(图片转base643

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　　介绍本文文章主要介绍PHP远程下载图片，微信头像保存在本地，本地图片转base64（示例代码）及相关经验技巧，文章约7412字，页面浏览量191，3个赞，值得参考！

　　方法一（推荐）：

　　function download_remote_pic($url){

$header = [

‘User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0‘,

‘Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3‘,

‘Accept-Encoding: gzip, deflate‘,

];

$curl = curl_init();

curl_setopt($curl, CURLOPT_URL, $url);

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);

curl_setopt($curl, CURLOPT_ENCODING, ‘gzip‘);

curl_setopt($curl, CURLOPT_HTTPHEADER, $header);

$data = curl_exec($curl);

$code = curl_getinfo($curl, CURLINFO_HTTP_CODE);

curl_close($curl);

if ($code == 200) {//把URL格式的图片转成base64_encode格式的！

$imgBase64Code = "data:image/jpeg;base64," . base64_encode($data);

}

$img_content=$imgBase64Code;//图片内容

//echo $img_content;exit;

if (preg_match(‘/^(data:s*image/(w+);base64,)/‘, $img_content, $result)) {

$type = $result[2];//得到图片类型png?jpg?gif?

$new_file = "./".time().rand(1,10000).".{$type}";

if (file_put_contents($new_file, base64_decode(str_replace($result[1], ‘‘, $img_content)))) {

return $new_file;

}

}

}

$new_file = download_remote_pic(‘http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLlib3rTHIt2n0nrYFibmOc69IWwLABiaEMicfg0iahGUhP93jYicNZ5MWL9yYlHvibdlG36xWHuPs0p3ibPQ/132‘);

echo $new_file;

　　方法二（慢，消耗服务器）

　　$url=‘http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLlib3rTHIt2n0nrYFibmOc69IWwLABiaEMicfg0iahGUhP93jYicNZ5MWL9yYlHvibdlG36xWHuPs0p3ibPQ/132‘;

$new_file = "./".time().rand(1,10000).".png"; //图片类型getimagesize($url)可以但是因为是远程图片太慢了

file_put_contents($new_file, file_get_contents($url));

echo ($new_file);

　　图片转base64

　　function base64_encode_image($file){

$type=getimagesize($file);//取得图片的大小，类型等

$fp=fopen($file,"r")or die("Can‘t open file");

$file_content=chunk_split(base64_encode(fread($fp,filesize($file))));//base64编码

switch($type[2]){//判读图片类型

case 1:$img_type="gif";break;

case 2:$img_type="jpg";break;

case 3:$img_type="png";break;

}

$img=‘data:image/‘.$img_type.‘;base64,‘.$file_content;//合成图片的base64编码

fclose($fp);

return $img;

}