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preg_match("[u4e00-u9fa5a-zA-Z0-9-_]+","啊哈哈哈") 报错
- WBOYOriginal
- 2016-06-06 20:28:391527browse
<code>preg_match("[\u4e00-\u9fa5a-zA-Z0-9\-\_]+","啊哈哈哈") 报错
preg_match(): Unknown modifier '+'</code>
回复内容：
<code>preg_match("[\u4e00-\u9fa5a-zA-Z0-9\-\_]+","啊哈哈哈") 报错
preg_match(): Unknown modifier '+'</code>
在PHP中用\x表示十六进制数据的
且必须u修正符启用了一个 PCRE 中与 Perl 不兼容的额外功能
<code>preg_match("/[\x{4e00}-\x{9fa5}a-zA-Z0-9\-_]+/u","啊哈哈哈1121234", $res);
print_r($res);</code>
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