PHP Deleting last string devided by dot

PHP

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<?
$link = "192.168.196.128";
$a = explode(".", $link);

$b = strlen($a[3]);
$c = substr($link, 0, -$b);

echo "$c";
?>

PHPCount Words in a string Showing the file size in kilobytes Files sorting by name
PHPFiles sorting by size Deleting last string devided by dot Last date a file was modified
PHPUsing array to show last line of file Generating random alphabetic string Last time a file was modified