how to create a hit counter?

[Anon]

Hi all,
I want to create a visitor hit counter, I wrote some scripts but I don't know why, please help me to check it or give me some scripts
My scripts is:
<?
function display($file) {
$fopen = fopen($file,"wr");
$num = fgets($fopen,5);
$num = $num+1;
echo "You are visitor no "."$num";
exec( "rm -rf $file");
exec( "echo $num > $file");
}

       $file =  "count.txt";

       if ( !file_exists($file) ) {
            exec( "echo 0 > $file");
       }

       display($file);

?>

[edsko]

Hi,

You're not actually specifying what is going wrong, but there is definitely an error in your script: You open the file for read and write, you read the file, and then you're trying to remove the file again -- however, without closing the file first. That will cause a access violation error.

You should close the file first, and then remove it.

Second, there is no need for the 2 shell calls - just write the next value into the file using PHP and then fclose it.

HTH

Edsko

[Anon]

I came accross this code in the book "web application development with php 4.0". It's counter that represents an example of a self-modifying file.

<?
$counter = 0;

/////////////////////////////////
// Do not modify above this point
/////////////////////////////////


// increase counter
$counter++;

// write counter back to ourselves by having the 
// code open up this file and replace the first 
// in this file with its new value.
$file = fopen(basename($PHP_SELF), "r+");
fputs($file, "<?\n\t\$counter = $counter;");

// print counter or do other stuff
print("$counter hits so far");

?>

So each time this code is run, the value of the variable counter will be incremented by 1

[Anon]

For some reason the basename($PHP_SELF) returns null... but defining the filename instead works fine.

Howcome?

/Mad