editing a txt file in php

[rahuul]

hi all

 

i have a txt file which i want to edit on some condition. my code is as under

 

<?
$handle = fopen("keys/index.txt", "r+");
if ($handle) {
$i=0;
    while (!feof($handle)) {
print "hi<br>";
    $cert = fgets($handle);
        $s=strpos($cert,"\t02",0);
	if($s){

		$cert1 = str_replace("V","R",$cert);
		rewind($handle);
		fseek($handle,$i);


		fputs($handle, $cert1)or die("error");
		print $i."<br>";
		exit;

	}
$i++;	
}

fclose($handle);
}
print substr($cert,$s+1,2);

?>

 

here i want to edit only one line if the line contain "\t02". i have user $i to count line no but after rewind how to come back to that line no.

 

i used fseek but it moves pointer to that carector not on that line pls help...............

 

thanks