PHP Manual: Replace regular expression case insensitive

Description

string eregi_replace ( string $pattern , string $replacement , string $string )

This function is identical to ereg_replace except that this ignores case distinction when matching alphabetic characters.

Warning

This function has been DEPRECATED as of PHP 5.3.0. Relying on this feature is highly discouraged.

Parameters

pattern: A POSIX extended regular expression.
replacement: If pattern contains parenthesized substrings, replacement may contain substrings of the form \digit, which will be replaced by the text matching the digit'th parenthesized substring; \0 will produce the entire contents of string. Up to nine substrings may be used. Parentheses may be nested, in which case they are counted by the opening parenthesis.
string: The input string.

Return Values

The modified string is returned. If no matches are found in string, then it will be returned unchanged.

Examples

Example #1 Highlight search results


<?php
$pattern = '(>[^<]*)('. quotemeta($_GET['search']) .')';
$replacement = '\\1<span class="search">\\2</span>';
$body = eregi_replace($pattern, $replacement, $body);
?>

Notes

Note:
As of PHP 5.3.0, the regex extension is deprecated in favor of the PCRE extension. Calling this function will issue an E_DEPRECATED notice. See the list of differences for help on converting to PCRE.

Tip

eregi_replace is deprecated as of PHP 5.3.0. preg_replace with the i (PCRE_CASELESS) modifier is the suggested alternative.