PHP and Regular Expressions 101 - Page 2

by: Mitchell Harper

May 31, 2007

PHP has six functions that work with regular expressions. They all take a regular expression string as their first argument, and are shown below:

ereg: The most common regular expression function, ereg allows us to search a string for matches of a regular expression.
ereg_replace: Allows us to search a string for a regular expression and replace any occurrence of that expression with a new string.
eregi: Performs exactly the same matching as ereg, but is case insensitive.
eregi_replace: Performs exactly the same search-replace functionality as ereg_replace, but is case insensitive.
split: Allows us to search a string for a regular expression and returns the matches as an array of strings.
spliti: Case insensitive version of the split function

This article originally appeared on WebReference.com.

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