Mobile Billing Meter

Posted on | March 14, 2009 | No Comments

Billing Meter bit.ly link or Billing Meter tech0x20 link.

This isn’t perfect. First of all, some connections are just too slow for a constant refresh rate of less than 20-30 seconds. Secondly, I think many mobile browsers have a refresh cut-off at which point they will ask you if you really want to keep refreshing.

The first page, index.php, allows you to enter parameters:

 PHP |   copy code | ?  
01 <?php
02 ?>
03 <h2>Billing Meter</h2>
04 <FORM ACTION="meter.php" METHOD="POST">
05 <TABLE>
06 <TR>
07 	<TD>Billing Rate per Hour</TD><TD><INPUT TYPE="TEXT" NAME="BILLINGRATE"/></TD>
08 </TR>
09 <TR>
10 	<TD>Update Interval (in seconds)</TD><TD><INPUT TYPE="TEXT" NAME="REFRESHRATE"/></TD>
11 </TR>
12 <TR>
13 	<TD>Press Submit to start the counter.</TD><TD><INPUT TYPE="SUBMIT" NAME="Submit"/></TD>
14 </TR>
15 </TABLE>
16 <INPUT TYPE="HIDDEN" NAME="STARTTIME" VALUE="-1"/>
17 </FORM>

The second file, meter.php, does the display, calculation and refresh:

 PHP |   copy code | ?  
01 <?php
02 session_start();
03 if(strlen($_POST["BILLINGRATE"]))
04 {
05  
06 	$_SESSION["BILLINGRATE"] = (double)$_POST["BILLINGRATE"];
07 	$_SESSION["REFRESHRATE"] = (int)$_POST["REFRESHRATE"];
08 	if($_POST["STARTTIME"] == "-1")
09 	{
10 		$_SESSION["STARTTIME"] = time();
11 	}
12 }
13  
14 echo "<meta http-equiv=\"refresh\" content=\"".$_SESSION["REFRESHRATE"]."\">";
15  
16 $netseconds = time()-$_SESSION["STARTTIME"];
17 $cost = sprintf("%10.2lf", round($_SESSION["BILLINGRATE"]*((double)$netseconds)/3600.0,2));
18 ?>
19 <h2>Billing meter</h2>
20 <b>Time spent:</b>
21 <?
22 $time_counter = sprintf("%02d:%02d:%02d", $netseconds/3600, $netseconds / 60 % 60, $netseconds % 60);
23 ?>
24 <table><tr>
25 <?
26 for($i=0; $i<8; $i++)
27 {
28 	echo "<td>".$time_counter[$i]."</td>";
29 }
30 ?>
31 </tr></table>
32 <b>Your bill:</b>
33 <table><tr>
34 <td>$</td><?
35 for($i=0; $i<10; $i++)
36 {
37 	if($cost[$i]==" ")
38 	{
39 		?><td>&nbsp;</td><?	
40 	}
41 	else
42 	{
43 		echo "<td>".$cost[$i]."</td>";
44 	}
45 }
46 ?>
47 </tr></table>
48

Share and Enjoy:

Category: bookmarks, php, programming
Tags: billing > fun

Tech Space

Experiencing Tech as a Professional Techie

Mobile Billing Meter

Comments

Feed links

Tags

Pages

Archives

Acknowledgements and Links

About Me

Blogroll

Feed links

Tech Updates

Recent Posts

Recent Comments

01	<?php
02	?>
03	<h2>Billing Meter</h2>
04	<FORM ACTION="meter.php" METHOD="POST">
05	<TABLE>
06	<TR>
07	<TD>Billing Rate per Hour</TD><TD><INPUT TYPE="TEXT" NAME="BILLINGRATE"/></TD>
08	</TR>
09	<TR>
10	<TD>Update Interval (in seconds)</TD><TD><INPUT TYPE="TEXT" NAME="REFRESHRATE"/></TD>
11	</TR>
12	<TR>
13	<TD>Press Submit to start the counter.</TD><TD><INPUT TYPE="SUBMIT" NAME="Submit"/></TD>
14	</TR>
15	</TABLE>
16	<INPUT TYPE="HIDDEN" NAME="STARTTIME" VALUE="-1"/>
17	</FORM>

01	<?php
02	session_start();
03	if(strlen($_POST["BILLINGRATE"]))
04	{
05
06	$_SESSION["BILLINGRATE"] = (double)$_POST["BILLINGRATE"];
07	$_SESSION["REFRESHRATE"] = (int)$_POST["REFRESHRATE"];
08	if($_POST["STARTTIME"] == "-1")
09	{
10	$_SESSION["STARTTIME"] = time();
11	}
12	}
13
14	echo "<meta http-equiv=\"refresh\" content=\"".$_SESSION["REFRESHRATE"]."\">";
15
16	$netseconds = time()-$_SESSION["STARTTIME"];
17	$cost = sprintf("%10.2lf", round($_SESSION["BILLINGRATE"]*((double)$netseconds)/3600.0,2));
18	?>
19	<h2>Billing meter</h2>
20	<b>Time spent:</b>
21	<?
22	$time_counter = sprintf("%02d:%02d:%02d", $netseconds/3600, $netseconds / 60 % 60, $netseconds % 60);
23	?>
24	<table><tr>
25	<?
26	for($i=0; $i<8; $i++)
27	{
28	echo "<td>".$time_counter[$i]."</td>";
29	}
30	?>
31	</tr></table>
32	<b>Your bill:</b>
33	<table><tr>
34	<td>$</td><?
35	for($i=0; $i<10; $i++)
36	{
37	if($cost[$i]==" ")
38	{
39	?><td> </td><?
40	}
41	else
42	{
43	echo "<td>".$cost[$i]."</td>";
44	}
45	}
46	?>
47	</tr></table>
48