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PHP and Regular Expressions 101


A regular expression is a specially formatted pattern that can be used to find instances of one string in another. Several programming languages including Visual Basic, Perl, JavaScript and PHP support regular expressions, and hopefully by the end of this primer, Mitchell should have you implementing some basic regular expression functionality into your PHP pages.

Author Info:
By: Mitchell Harper
Rating: 4 stars4 stars4 stars4 stars4 stars / 24
March 28, 2002
TABLE OF CONTENTS:
  1. · PHP and Regular Expressions 101
  2. · What is a regular expression?
  3. · The regular expression syntax
  4. · The regular expression syntax (contd.)
  5. · Regular expression examples
  6. · Conclusion

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PHP and Regular Expressions 101 - Conclusion
(Page 6 of 6 )

Regular expressions take a lot of the hassle out of writing lines and lines of repetitive code to validate a string. Over the last few pages we've covered all of the basics of Posix standard regular expression patterns including symbols, grouping and the PHP ereg function. We've also seen how to use the regular expression engine to validate some simple strings in PHP.
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