Regular Expression
N/A
正则表达式
Regular Expression · N/A · 正则表达式 · REG-eks · regex · regexp · Programming · patterns · text · validationProgrammingregex regexp/REG-eks/
Also known as: regex, regexp
Last updated August 8, 2026
Definition
A regular expression is a compact pattern language for searching, validating, and transforming text — such as emails, phone numbers, or log lines.
Real-World Example
A signup form may use a regex to check that an email contains an @ and a domain before accepting it.
References
Related terms
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