Web page counter code written in php_PHP tutorial

$countfile = "counter.txt";
//The file that defines the counter is written to the counter.txt file in the current directory, and then we should test whether the file can be opened
if (($fp = fopen($countfile, "r+")) == false) {
//Open the file in read-write mode, exit if it cannot be opened
printf ("open file %s failed!",$countfile);
exit;
}
else
{
//If the file can be opened normally, read the data in the file, assuming it is 1
$count = fread ($fp,10);
//Read 10-bit data
$count = $count + 1;
//count++
fclose ($fp);
//Close the current file
$fp = fopen($countfile, "w+");
//Open the file in overwrite mode
fwrite ($fp,$count);
//Write new data after adding 1
fputs($fp,$fg);
//Display counting results
//Number display
echo "

Count times: $count
";

//Graphic mode count
$fp = fopen ($countfile, "r"); //Open the file in read-only mode
$array_count = 1; //Define a variable that represents the position of the array element, use
below while (! feof($fp)) {
$current_number = fgetc($fp);
$counter_array[$array_count] = $current_number;
$array_elements = count ($counter_array);
$array_count = $array_count + 1;
}
echo "

Number of counts:";
for ($array_id = 1;$array_id < $array_elements; ++ $array_id) {
echo "";
}
echo "";

fclose ($fp);
//And close the file
}

?>