AJAX と PHP を使用して、訪問者がページに費やした時間をサーバーに伝え、そこで PHP スクリプトが費やした時間を他の詳細と共にテキスト ファイルに書き込みます。AJAX スクリプトは php スクリプトを呼び出すことができないため、訪問者の詳細が記録されません。
<script type="text/javascript">
var startTime = new Date(); //Start the clock!
window.onbeforeunload = function() //When the user leaves the page(closes the window/tab, clicks a link)...
{
var endTime = new Date(); //Get the current time.
var timeSpent = (endTime - startTime); //Find out how long it's been.
var xmlhttp; //Make a variable for a new ajax request.
if (window.XMLHttpRequest) //If it's a decent browser...
{
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest(); //Open a new ajax request.
}
else //If it's a bad browser...
{
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); //Open a different type of ajax call.
}
xmlhttp.open("GET","ajaxphp.php?time="+timeSpent,false); //The false at the end tells ajax to use a synchronous call which wont be severed by the user leaving.
xmlhttp.send(); //Send the request and don't wait for a response.
}
</script>
これはAJAXスクリプトです
PHP スクリプトも以下に示します。
<?php
$time=$_GET["time"];
$countfile = "counter.txt";
// location of site statistics.
$statsfile = "stats.txt";
// checks whether the file exist, if not then server will create it.
if (file_exists($countfile)) {
// open the counter hit file.
$fp = fopen($countfile, "r");
// reads the counter hit file and gets the size of the file.
$output = fread($fp, filesize($countfile));
// close the counter hit file.
fclose($fp);
// get the integer value of the variable.
$count = intval($output);
}
// if file is doesn't exist, the server will create the counter hit file and gives a value of zero.
else {
$count = 0;
}
// showcount function starts here.
function ShowCount() {
// declares the global variables.
global $ShowCount, $countfile, $statsfile, $count,$time;
// get the current month.
$month = date('m');
// get the current day.
$day = date('d');
// get the current year.
$year = date('Y');
// get the current hour.
$hour = date('G');
// get the current minute.
$minute = date('i');
// get the current second.
$second = date('s');
// this is the date used in the stats file
$date = "$month/$day/$year $hour:$minute:$second";
// this is the remote IP address of the user.
$remoteip = getenv("REMOTE_ADDR");
// some of the browser details of the user.
$otherinfo = getenv("HTTP_USER_AGENT");
// retrieve the last URL where the user visited before visiting the current file.
$ref = getenv("HTTP_REFERER");
// open the statistics file.
$fp = fopen($statsfile, "a");
// put the given data into the statistics file.
fputs($fp, "Remote Address: $remoteip | ");
fputs($fp, "Information: $otherinfo | ");
fputs($fp, "Date: $date | ");
fputs($fp, "Referer: $ref\n");
fputs($fp, "Time Spent: $time | ")
// close the statistics file.
fclose($fp);
// adds 1 count to the counter hit file.
$count++;
// open the counter hit file.
$fp = fopen($countfile, "w");
// write at the counter hit file.
// if the value is 34, it will be changed to 35.
fwrite($fp, $count);
// close the counter hit file.
fclose($fp);
// showcount variable is equal to count variable.
$ShowCount = $count;
// return the value of the count variable into showcount variable.
return $ShowCount;
}
// display the value in the counter hits file.
echo showcount(), " visits";
?>