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PHP Server Side Scripting Forum

    
Problem with PHP function
and Form action="<?php print $PHP_SELF ?>"
circuitjump

10+ Year Member



 
Msg#: 287 posted 9:14 pm on Aug 17, 2001 (gmt 0)

OK, I've been trying for hours to make this work but it won't work. Anyway I'm trying to make it calculate a set of numbers the user gives it and then let it give the result of the calculations in it's own fields on the same page.

here is the url if you want to see it

Here's the code
[se.ydi.com...]

<?php
function cmdSOM() {
$FreqMHz = (is_numeric($txtfsll_Freq));
$DistMi = (is_numeric($txtfsll_Dist));

$txtFSL = round(20 * log10($FreqMHz) + 20 * log10($DistMi) + 36.6,1);

$TXpwr = (is_numeric($txtTXpwr));
$TXcabloss = (is_numeric($txtTXcabloss));
$TXantgain = (is_numeric($txtTXantgain));
$RXantgain = (is_numeric($txtRXantgain));
$RXcabloss = (is_numeric($txtRXcabloss));
$RXsens = (is_numeric($txtRXsens));
$FSL = (is_numeric($txtFSL));

$txtSOM = round(($TXpwr - $TXcabloss + $TXantgain - $FSL + $RXantgain - $RXcabloss - $RXsens),1) ;
$txtRXsig = round(($TXpwr - $TXcabloss + $TXantgain - $FSL + $RXantgain - $RXcabloss),1);
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<html>
<head>
<?php
if (is_numeric($txtfsll_Freq)) {
print "<script language=JavaScript><!--window.alert(Frequency in miles must be an INTEGER or a DECIMAL); //--></script>";
}
if (is_numeric($txtfsll_Dist)) {
print "<script language=JavaScript><!--window.alert(Distance in miles must be an INTEGER or a DECIMAL); //--></script>";
}
if (is_numeric($TXpwr)) {
print "<script language=JavaScript><!--window.alert(Transmit power must be an INTEGER or a DECIMAL); //--></script>";
}
if (is_numeric($TXcabloss)) {
print "<script language=JavaScript><!--window.alert(Transmit cable loss must be an INTEGER or a DECIMAL); //--></script>";
}
if (is_numeric($TXantgain)) {
print "<script language=JavaScript><!--window.alert(Transmit antenna gain must be an INTEGER or a DECIMAL); //--></script>";
}
if (is_numeric($RXantgain)) {
print "<script language=JavaScript><!--window.alert(Receive antenna gain must be an INTEGER or a DECIMAL); //--></script>";
}
if (is_numeric($RXcabloss)) {
print "<script language=JavaScript><!--window.alert(Receive cable loss must be an INTEGER or a DECIMAL); //--></script>";
}
if (is_numeric($RXsens)) {
print "<script language=JavaScript><!--window.alert(Receive sensitivity must be an INTEGER or a DECIMAL); //--></script>";
}
?>

<title>Untitled</title>
</head>

<body>

<table cellpadding="3" cellspacing="2" border="0" width="600">

<form name="main" action="<?php print $PHP_SELF ?>" method="GET">

<tr>
<td align="left" valign="top" bgcolor="#003366" colspan="2"><p class="form">Operting Frequency</td>
<td align="left" valign="top" bgcolor="#003366" colspan="3"><p class="form">Distance between Antenna</td></tr>
<tr>
<td align="left" valign="top" colspan="2"><input type="text" name="txtfsll_Freq" value="2400" size="7" maxlength="7"> (MHz)<br><br></td>
<td align="left" valign="top" colspan="3"><input type="text" name="txtfsll_Dist" size="7" maxlength="7"> (Miles)<br><br></td></tr>
<tr>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Tx Power</td>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Tx Cable Loss</td>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Tx Antenna Gain</td>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Rx Antenna Gain</td>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Rx Cable Loss</td></tr>
<tr>
<td align="left" valign="top"><input type="text" name="txtTXpwr" size="5" maxlength="5"> (dBm)<br><br></td>
<td align="left" valign="top"><input type="text" name="txtTXcabloss" size="5" maxlength="5"> (dB)<br><br></td>
<td align="left" valign="top"><input type="text" name="txtTXantgain" size="5" maxlength="5"> (dBi)<br><br></td>
<td align="left" valign="top"><input type="text" name="txtRXantgain" size="5" maxlength="5"> (dBi)<br><br></td>
<td align="left" valign="top"><input type="text" name="txtRXcabloss" size="5" maxlength="5"> (dBi)<br><br></td></tr>
<tr>
<td align="left" valign="top" bgcolor="#003366" colspan="5"><p class="form">Calculate</td></tr>
<tr>
<td align="left" valign="top" colspan="5"><input type="Submit" name="cmdSOM" value="Calculate SOM" ><br></td></tr>
<tr>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Rx Sensitivity</td>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Free Space Loss</td>
<td align="left" valign="top" bgcolor="#003366"><p class="form">Rx Signal Level</td>
<td align="left" valign="top" bgcolor="#003366" colspan="2"><p class="form">Theoretical System Operating Margin</td></tr>
<tr>
<td align="left" valign="top"><input id="txtRXsens" type="text" name="txtRXsens" value="-85" size="5" maxlength="5"> (dBm)<br><br></td>
<td align="left" valign="top"><input type="text" name="txtFSL" size="6" maxlength="6" value="<?php print cmdSOM($txtFSL) ?>"> (dB)<br><br></td>
<td align="left" valign="top"><input type="text" name="txtRXsig" size="6" maxlength="6" value="<?php print cmdSOM($txtRXsig) ?>"> (dBm)<br><br></td>
<td align="left" valign="top" colspan="2"><input type="text" name="txtSOM" size="6" maxlength="6" value="<?php print cmdSOM($txtSOM) ?>"> (dB)<br><br></td></tr>
</form>
</table>

 

Air

WebmasterWorld Senior Member 10+ Year Member



 
Msg#: 287 posted 12:33 am on Aug 18, 2001 (gmt 0)

If you print the vars from within the function:

<?php
function cmdSOM() {
.
.
.
.
print "$txtFSL<br>";
print "$txtRXsig<br>";
print "$txtSOM";

}
?>

Do you get the correct results?

toadhall

10+ Year Member



 
Msg#: 287 posted 3:29 am on Aug 18, 2001 (gmt 0)

Don't "print" your function in the form's value parameter, just call it:
<?php cmdSOM($txtFSL) ?>

circuitjump

10+ Year Member



 
Msg#: 287 posted 3:12 pm on Aug 20, 2001 (gmt 0)

Hi all,
To answer your guestion Air, nope I don't get an answer at all.

I'll try it out toadhall.

Thanks

circuitjump

10+ Year Member



 
Msg#: 287 posted 4:34 pm on Aug 20, 2001 (gmt 0)

You know, I enter the numbers and then hit the submit button and it does not give me the result. If you look to the top, on the URL the string has the variables, but they have no value.

test-php-calc.php?txtfsll_Freq=2400&txtfsll_Dist=2&txtTXpwr=2&txtTXcabloss=2&txtTXantgain=2&txtRXantgain=2&txtRXcabloss=2&cmdSOM=Calculate+SOM&txtRXsens=-85&txtFSL=&txtRXsig=&txtSOM=

What am I doing wrong :o

circuitjump

10+ Year Member



 
Msg#: 287 posted 10:55 pm on Aug 20, 2001 (gmt 0)

Got it working.
Thanks you all

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