strip alpha

[nikko50]

How can I strip the alpha charactor(s) only if it exists at the end of the string??
$value="11bb44yza":

[devinemke]

$value = '11bb44yza';
echo $value . '<br>';

$array = str_split($value);
$array = array_reverse($array);
foreach ($array as $key => $value)
{
	if (!is_numeric($value)) {unset($array[$key]);}
	else {break;}
}
$array = array_reverse($array);
$value = implode('', $array);
echo $value . '<br>';

[laserlight]

You may also consider using [man]rtrim/man with a suitable character list, or use regex such as:

$value = '11bb44yza';
$value = preg_replace('/(.*\d)[a-z]+$/i', '\1', $value);