POSIX Regex Functions
PHP Manual


(PHP 4, PHP 5)

eregiCase insensitive regular expression match


This function was DEPRECATED in PHP 5.3.0, and REMOVED in PHP 7.0.0.

Alternatives to this function include:


int eregi ( string $pattern , string $string [, array &$regs ] )

This function is identical to ereg() except that it ignores case distinction when matching alphabetic characters.



Case insensitive regular expression.


The input string.


If matches are found for parenthesized substrings of pattern and the function is called with the third argument regs, the matches will be stored in the elements of the array regs.

$regs[1] will contain the substring which starts at the first left parenthesis; $regs[2] will contain the substring starting at the second, and so on. $regs[0] will contain a copy of the complete string matched.

Return Values

Returns the length of the matched string if a match for pattern was found in string, or FALSE if no matches were found or an error occurred.

If the optional parameter regs was not passed or the length of the matched string is 0, this function returns 1.


Example #1 eregi() example

if (
eregi('z'$string)) {
"'$string' contains a 'z' or 'Z'!";

See Also

POSIX Regex Functions
PHP Manual