regex 中文

在javascript中，要判断字符串是中文是很简单的。比如：

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var str = "php编程"; if (/^[\u4e00-\u9fa5]+$/.test(str)) { alert("该字符串全部是中文"); } else { alert("该字符串不全部是中文"); }

 PHP正确匹配中文方式， “u" for utf-8 mode

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$str = "php编程"; if (preg_match("/^[\x{4e00}-\x{9fa5}]+$/u",$str)) { print("该字符串全部是中文"); } else { print("该字符串不全部是中文"); }

QRCode Generator in Php

phpqrcode http://phpqrcode.sourceforge.net/ can be used to generate qrcode in php.

It supports to generate the code and save to external file or export to browser.

ob_start();

\PHPQRCode\QRcode::png('http://www.chatcai.tk/player-chatroom/register?code='.$model->invitation_code, null, 'L', 4, 2);

$imageString = base64_encode( ob_get_contents() );

ob_end_clean();