[PHP] Counter has gremlins

[Brian V Bonini]

I have this basic counter: 

<?php 
    $counterFile = "./counter.txt"; 
    function displayCounter($counterFile) { 
            global  $counted; 
            $fp     = fopen($counterFile, 'rw'); 
            $num    = fgets($fp,7); 
            if (!$counted) { 
                    $num    += 1; 
                    unlink("$counterFile"); 
                    exec("echo $num > $counterFile"); 
            } 
            print "Visitor #$num"; 
    } 
    if (!file_exists($counterFile)) { 
            exec("echo 1 > $counterFile"); 
    } 
    displayCounter($counterFile); 
            
?> 

Works like a charm but every so often for no apparent reason it resets
to 0.

Anyone see anything wrong here to cause that?


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