PHP: extract email addresses from string

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this function searches for email adresses inside a String and returns an array containing the adresses. Thanks to unicode parsing it can detect those with umlauts also.

<?php

/**
 * search for email adresses, returns them as array
 * @access public
 * @param string $sString String to search in
 * @return array $aMatch
 */
function getEmailArrayFromString($sString = '')
{
    $sPattern = '/[\._\p{L}\p{M}\p{N}-]+@[\._\p{L}\p{M}\p{N}-]+/u';
    preg_match_all(
        $sPattern,
        $sString,
        $aMatch
    );
    $aMatch = array_keys(
        array_flip(
            current($aMatch)
        )
    );

    return $aMatch;
}

// Example
$sString = 'foo@example.com XXX bar@example.com XXX <baz@example.com>';

$aEmail = getEmailArrayFromString($sString);

/**
 * array(3) {
    [0]=>
        string(15) "foo@example.com"
    [1]=>
        string(15) "bar@example.com"
    [2]=>
        string(15) "baz@example.com"
    }
*/
var_dump($aEmail);