PHP timestamp to/from file

[Yaik]

Hey guys, I would like to know if you guys can help me make a simple PHP script that will:

1-Have a button, and when you press that button it will produce a time stamp and display it on the screen.

2-Save that timestamp to a file (e.g. timestamp.txt).

3-Next time the page is loaded, the timestamp from the file will be displayed.

p.s. If you can, have it so that if 2 hours haven't passed yet, they get some time of alert letting them know to wait 2 hours before pressing the button again.

Thanks.

 

[vacunita]

We are here to hep you if you have issues with your existing code, not to write the entire code for you.

I suggest you look at the time() , date() , fopen() , fread() and fwrite() functions in the php online manual as a starting point.

http://php.net/manual/en/index.php

----------------------------------
Phil AKA Vacunita
----------------------------------
Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

Behind the Web, Tips and Tricks for Web Development.

http://behindtheweb.blogspot.com/

 

[Yaik]

ok, so I do have the code to have a sort of time stamp for the site.

function getTime()
{
  // create the xmlhttp object
  xmlhttp=GetXmlHttpObject();

  if (xmlhttp==null)
  {
    alert ("Your browser doesn't support AJAX or you are blocking Javascript");
    return;
  }

  // define a variable that indicates which backend PHP script we want to run
  var url="time.php";
  xmlhttp.onreadystatechange=stateChanged;
  xmlhttp.open("GET",url,true);
  xmlhttp.send(null);
}

function stateChanged()
{
  if (xmlhttp.readyState==4)
  {
    // modify the HTML inside of the "myResponse" div tag
    document.getElementById("myResponse").innerHTML=xmlhttp.responseText;
  }
}


function GetXmlHttpObject()
{
  if (window.XMLHttpRequest)
  {
    // code for IE7+, Firefox, Chrome, Opera, Safari
    return new XMLHttpRequest();
  }
  if (window.ActiveXObject)
  {
    // code for IE6, IE5
    return new ActiveXObject("Microsoft.XMLHTTP");
  }
  return null;
}
</script>

The 'time.php' file contains this:

<?php 
echo date("m/d/y : H:i:s", time()) 
?>

and I am displaying the information by doing this

<input type="button" value="Run Script on All Computers" style="height: 25px; width: 180px" onClick="getTime();"><div style="float:left"; id="myResponse"></div>');

Now, what I would like help doing is being able to capture that time stamp and put it in a file, and then when the site is reloaded, it displays it.

I am not very good with PHP at all, and I have tried to get it to work, but it was just a big mess.

Here is an example of what I tried to do, which did absolutely nothing.

<?php 
$myFile = "timestamp.txt";
$fh = fopen($myFile, 'w');
?>
<input type="button" value="Run Script on All Computers" style="height: 25px; width: 180px" onClick="getTime();"><?php $stringData = "<div style='float:left'; id='myResponse'></div>"; fwrite($fh, $stringData);fclose($fh);?>');

 

[jpadie]

Use sessions

 

[Yaik]

Thank you.

 

[vacunita]

I'd say if you want a different timestamp per visitor, then a cookie may be a better option. If you want to maintain the same timestamp for all visitors then a server file would be better.


From your code something like this should work for a general sever file:

<?php 
$filename="path/to/file.tmp";
if(file_exists($filename)){
$fileHandle=fopen("path\to\file.tmp","r");
$timestamp=fread($handle, filesize($filename));
}
else{
$timestamp=date("m/d/y : H:i:s", time()) ;
$fileHandle=fopen("path\to\file.tmp","w+");
}


$f=fwrite($fileHandle, $timestamp);

fclose($filehandle);

echo $timestamp;

?>

----------------------------------
Phil AKA Vacunita
----------------------------------
Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

Behind the Web, Tips and Tricks for Web Development.

http://behindtheweb.blogspot.com/