file open error

<?php


$frow=0;
$list = array_map("trim", file($filename));
$list = array_map( create_function('$line', 'return split(",", $line);'), $list);
$numrow=sizeof($list);

for($r=1;$r<$numrow+1;$r++){
if($list[$r-1][6]){
$frow++;
for($c=1;$c<8;$c++)
$final[$frow-1][$c-1]=$list[$r-1][$c-1];
}
}
$file="c:\\a.csv";

if(file_exists($file))
if(!fopen($file, 'w+'))
echo "k1";


$handle = fopen($file, 'w+');
$a="as";
if(!fwrite($handle, $a))
echo "bad";
fclose($handle);

?>



this code doesn`t open the file even when the file exists what could be the problem

 

Just for test try to open a file in read only mode
fopen($file, 'r');

 

is it giving some sort of error or responding something else ...

 

thanx itranna and jitesh for taking intrest. The files open when
fopen($file, 'r'); is written now i want to open a file and write in it

 

Now place a file in same directory where you have placed ur script file. then try to open a file in write mode

If It will open then you will understand what the matter is.

 

Check the file permissions.. May be the case as well