请高手指点小弟

[vsmwc]

<?
/*
||一个简单的计数器
*/
function get_hitcount($counter_file)
{
$count=0;
if (file_exists($counter_file))
{
$fp=fopen($counter_file,"r");
$count=0+fgets($do,20);
fclose($fp);
}
$count++;
$fp=fopen($counter_file."w");
fputs($fp,$count);
fclose($fp);
return($count);
}
?>
为什么会提示Parse error: syntax error, unexpected T_STRING, expecting ')' in c:\AppServ\www\include\counter2.inc on line 5
这样的错误

[Fufay]

$count=0+fgets($fp,20);

[颓废的老猫]

$fp=fopen($counter_file,"w");

[iasky]

语法错误