<?php
	mysql_connect('host', 'user', 'pw');
	mysql_select_db('db');

	$username = mysql_real_escape_string($_GET['username']);
	if(!$username){
		die("Du musst ein Namen angeben.");
	}

	$query = mysql_query("SELECT * FROM accounts WHERE name = '".$username."'");
	$row = mysql_fetch_object($query);

	$arrested = $row->arrested;
	$arrested += 1;

	mysql_query("UPDATE accounts SET arrested = ".$arrested." WHERE name = '".$username."'");
?>