Three php counter codes

The code is as follows:

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<? Php // Counter Function countx ($ file = "count. dat "){ If (file_exists ($ file )){ $ Fp = fopen ($ file, "r "); $ Numx = fgets ($ fp, 10 ); Fclose ($ fp ); $ Numx ++; // The above four lines of code can be replaced by an expression: $ numx = file_get_contents ($ file) + 1; } Else { $ Numx = 1 ;} File_put_contents ($ file, $ numx); // when the file does not exist, this function automatically creates the file and converts the parameter to a string for writing. Echo $ numx; /* The entire function body can be replaced by two expressions: file_exists ($ file )? File_put_contents ($ file, file_get_contents ($ file) + 1): file_put_contents ($ file, "1"); readfile ($ file ); */ } // Function call Countx (); ?>

Code 2

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<? Php       $ Counterfile = "balong.txt"; // number of file names for storing numeric values    Function displaycounter ($ counterfile ){ $ Fp = fopen ($ counterfile, "rw "); $ Num = fgets ($ fp, 5 ); $ Num + = 1; Print "you are the". "$ num". "guy reading the barrier counter "; Exec ("rm-rf $ counterfile "); Exec ("echo $ num> $ counterfile ");   }    If (! File_exists ($ counterfile )){ Exec ("echo 0> $ counterfile ");   }    Displaycounter ($ counterfile );    ?>

Code 3

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<? Php       $ Counterfile = "www.111cn.net.txt"; // number of file names for storing numeric values    Function displaycounter ($ counterfile ){ $ Fp = fopen ($ counterfile, "rw "); $ Num = fgets ($ fp, 5 ); $ Num + = 1; Print "you are the". "$ num". "guy reading the barrier counter "; Exec ("rm-rf $ counterfile "); Exec ("echo $ num> $ counterfile ");   }    If (! File_exists ($ counterfile )){ Exec ("echo 0> $ counterfile ");   }    Displaycounter ($ counterfile );    ?>