PHP 8.0.0 Beta 4 available for testing

sql_regcase

(PHP 4, PHP 5)

sql_regcaseMake regular expression for case insensitive match

Warning

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

Alternatives to this function include:

Description

sql_regcase ( string $string ) : string

Creates a regular expression for a case insensitive match.

Parameters

string

The input string.

Return Values

Returns a valid regular expression which will match string, ignoring case. This expression is string with each alphabetic character converted to a bracket expression; this bracket expression contains that character's uppercase and lowercase form. Other characters remain unchanged.

Examples

Example #1 sql_regcase() example

<?php
echo sql_regcase("Foo - bar.");
?>

The above example will output:

[Ff][Oo][Oo] - [Bb][Aa][Rr].

This can be used to achieve case insensitive pattern matching in products which support only case sensitive regular expressions.

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User Contributed Notes 3 notes

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0
fernandovaller at gmail dot com
4 months ago
function php7_regcase($str)
{

    if (empty($str))
        return '';

    $chars = str_split($str);

    foreach ($chars as $char) {
        if (preg_match("/[A-Za-z]/", $char)) {
            $str_upper = mb_strtoupper($char, 'UTF-8');
            $str_lower = mb_strtolower($char, 'UTF-8');
            $resp[] = "[{$str_upper}{$str_lower}]";
        } else {
            $resp[] = $char;
        }
    }

    return implode('', $resp);
}
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0
edge at gts dot smtn dot stavropol dot ru
17 years ago
if you set right locale:

setlocale(LC_CTYPE,"ru_RU.KOI8-R");

print sql_regcase("Цffnung");

will output:
"[Цц][Ff][Ff][Nn][Uu][Nn][Gg]"
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-2
phpcomment at revmaps dot no-ip dot biz
6 years ago
This function naivley replaces the letters in your expression.
if your expression uses [] already using this will probably break it
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