Shulou(Shulou.com)06/02 Report--

This article introduces you how to apply regular expressions in PHP, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Regular expression, also known as pattern expression, has a very complete syntax system that can write patterns, which provides a flexible and intuitive method of string processing. Regular expressions realize the operations of string matching, search, replacement and segmentation by constructing patterns with specific rules and comparing them with the input string information.

This program implements a Demo for login verification using regular expressions.

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