PHP TutorialLesson 23Free preview

PHP RegEx

This lesson is part of PHP · All levels

Summary

Regular expression (regex) is a specific pattern for matching text, such as checking email formats, phone numbers, or postal codes. This lesson introduces meta characters like ^, $, \d, and quantifiers that regulate the number of repetitions. With regex, the validation of complex text becomes more concise.

Key points

Regex uses patterns to match the sequence of characters.
^ marks the beginning, $ marks the end of the pattern
\d represents one digit of a number, \w represents a letter, a number, or a bottom line
Quantitative factors like *, +, and {n} set the number of repetitions

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