php图片转化为base64 php获取图片转为base64

```

/**

* 获取图片转为base64

* @param string $avatar

* @return bool|string

*/

function image_to_base64($avatar = '', $timeout = 9)

{

$avatar = str_replace('https', 'http', $avatar);

try {

$url = parse_url($avatar);

$url = $url['host'];

$header = [

'User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/0101 Firefox/45.0',

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

'Accept-Encoding: gzip, deflate, br',

'accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',

'Host:' . $url

];

$dir = pathinfo($url);

$host = $dir['dirname'];

$refer = $host . '/';

$curl = curl_init();

curl_setopt($curl, CURLOPT_REFERER, $refer);

curl_setopt($curl, CURLOPT_URL, $avatar);

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);

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

curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, $timeout);

curl_setopt($curl, CURLOPT_HTTPHEADER, $header);

$data = curl_exec($curl);

$code = curl_getinfo($curl, CURLINFO_HTTP_CODE);

curl_close($curl);

if ($code == 200) {

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

} else {

return false;

}

} catch (\Exception $e) {

return false;

}

}

```