84669 person learning
152542 person learning
20005 person learning
5487 person learning
7821 person learning
359900 person learning
3350 person learning
180660 person learning
48569 person learning
18603 person learning
40936 person learning
1549 person learning
1183 person learning
32909 person learning
首位可以是字母以及下划线。
首位之后可以是字母,数字以及下划线。
下划线后不能接下划线(这个不知道怎么处理)。
Regular expressions for verifying the format of database field names-PHP Chinese website Q&A-Regular expressions for verifying database field name format-PHP Chinese website Q&A
Look around and learn.
给一个 Perl 风格的结果,请大家验证一下是否正确:
(^_([a-zA-Z0-9]_?)*$)|(^[a-zA-Z](_?[a-zA-Z0-9])*_?$)
Regular expressions for verifying the format of database field names-PHP Chinese website Q&A-Regular expressions for verifying database field name format-PHP Chinese website Q&A
Look around and learn.
给一个 Perl 风格的结果,请大家验证一下是否正确: