A hit counter will let us know how many times a page is accessed. Incase one visitors loads the page several times, the hit counter willincrease several times (but this is likely to happen only a few times). The code for the hit counter bellow will save the number of hits in afile named counter.txt (the name of this file may be changed). Each time the page is loaded,the file will be read, the number will be increased by one and the newnumber will be saved to the same file. Counter.php <?php //The file where number of hits will be saved; name may be changed;p.e. "/counter_files/counter1.txt" $counterfile = " counter.txt "; // Opening the file; number of hit is stored in variable $hits $fp = fopen($counterfile,"r"); $hits = fgets($fp,100); fclose($fp); //increading number of hits $hits ++; //saving number of hits $fp = fopen($counterfile,"w"); fputs($fp, $hits ); fclose($fp); //printing hits; you may remove next lin...