atoms in regular expressions-Quick introduction to regular expressions-php.cn

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Quick introduction to regular expressions

Chapter1 Preparation
1-1 Regularity is the art of query
1-2 Regular verification tool
1-3 Regular debugging function
1-4 Regular verification function
Chapter2 Get started quickly
2-1 Regular delimiter
2-2 atoms in regular expressions
2-3 Metacharacters in regular expressions
2-4 Pattern modifiers in regular expressions
Chapter3 Classic example
3-1 Match non-null characters
3-2 Match mobile number
3-3 Match email address

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