[SOLVED] changing php variable values through an html link

[ag3nt42]

I'm building a calendar and I have the php building the calendar interface on the fly...

I'm trying to figure out how I can change a variable value through an Onclick event or the like.

 

any ideas would be appreciated.. thankx everyone.

 

so say i have

 

<?php
$z=0;
?>

<a href='#'onclick='<?php echo($z++); ?>'>NEXT MONTH</a>

 

upon click the link the month will change because the variable value has changed.

only thing is i can't get it to work.

 

anyone know of a better way to do this?

[The Little Guy]

You can't do that via PHP, unless the page reloads you then must use JavaScript.

[chronister]

<?php

$z=0;

?>

 

<a href="/destination_page.php?month=<?php echo $z++; ?>">NEXT MONTH</a>

 

 

Then in your code you would use

<?php $month = $_GET['month']; ?>

 

Nate

[ag3nt42]

it almost works.. but i think the problem is that each time you refresh the page z gets the 0 value again.. so it just stays 0 all the time

[ag3nt42]

i have tried using javascript to change the value of z but z is also used thorughout a bunch of php functions and loops that i have in place to dynamically build this thing... it doesn't seem to want to let me change the value of a php variable using js

[The Little Guy]

You can not change an onclick value, at least I don't know how, so I do a work around. First I remove it, then I add it.

 

// I use remove and set attribute
tagname.removeAttribute('onclick');    // attribute name
tagname.setAttribute('onclick',(z+1))  // attribute name followed by its value

[chronister]

JS is client side and php is server side.... JS CANNOT affect PHP values unless you use AJAX requests.

 

Post your actual code here so we can see it.

 

You won't want to set your value statically every time. You will look to the url and see if a value has been passed. e.g.

 

<?php

if(!isset($_GET['month']))
{
     $z = 0;
}
else
{
    $z = $_GET['month'];
}

?>

If month was passed through the url, then this would use that as the value of z, if not then $z is set statically.

 

Nate

 

[ag3nt42]

ok well i didn't want to do this but if it will help figure this out

 

<?php
//LIBRARY VARIABLES
$month = $_GET['month'];

$z=0;

$mL= array('January','February','March','April','May','June','July','August','September','October','November','December');

$m=$mL[$z];

$dL= array('31','29','31','30','31','30','31','31','30','31','30','31');

$d=$dL[$z];

$dn= array('Sunday','Monday','Tuesday','Wensday','Thursday','Friday','Saturday');

$y= '2008';

$x=0;



echo ('There are ' . $d .' days in ' . $m . ' ' . $y);

?>


<!-- MONTH/DAYs SWITCHER HTML //-->
<br /><br /><a href='schedule.php?month=<?php echo $z++; ?>'>NEXT MONTH >></a>


<!-- HTML //-->
<table id='dayTable'>
<tr>
<!-- END HTML //-->


<?php
// LIST OUR DAYS NAMES

while($x<=6)
{
echo("<td>" . $dn[$x] . "</td>");
$x++;
}
?>

<!-- HTML //-->
</tr>
<tr>
<!-- END HTML //-->

<?php
// THE VARIABLES

$i=0;
$n="";
$MakeDayB= "<td><div id='Daybox'>";
$MakeDayE= "</div></td>";

// START THE LOOP TO BUILD THE CALENDAR
while($i<=34)
{
echo $MakeDayB . $n . $MakeDayE;
$i++;

// START MONTH SPECIFIC CHECKS
//JAN
if($i>=2&&$y=="2008"&&$m==$mL[0])
{
	$n++;
}

if($i>=$dL[0]+2&&$m==$mL[0])
{
$n="";
}
//FEB
if($i>=5&&$y=="2008"&&$m==$mL[1])
{
	$n++;
}

if($i>=$dL[1]+5&&$m==$mL[1])
{
$n="";
}
//MAR


//BREAK THE CALENDAR DOWN EVERY 7 DAYS
if ($i==7||$i==14||$i==21||$i==28)
{
echo("</tr><tr>");
}
else
{
echo("");
}
}

?>
<!-- HTML //-->
</tr>
</table>

[ag3nt42]

JS is client side and php is server side.... JS CANNOT affect PHP values unless you use AJAX requests.

 

Post your actual code here so we can see it.

 

You won't want to set your value statically every time. You will look to the url and see if a value has been passed. e.g.

 

<?php

if(!isset($_GET['month']))
{
     $z = 0;
}
else
{
    $z = $_GET['month'];
}

?>

If month was passed through the url, then this would use that as the value of z, if not then $z is set statically.

 

Nate

 

 

I tried this but it doesn't seem to want to change the value of z

[jonsjava]

<?php
//LIBRARY VARIABLES
if (!(isset($_GET['month']))){
$z=0;
}
else{
$z = $_GET['month'];
}

$mL= array('January','February','March','April','May','June','July','August','September','October','November','December');

$m=$mL[$z];

$dL= array('31','29','31','30','31','30','31','31','30','31','30','31');

$d=$dL[$z];

$dn= array('Sunday','Monday','Tuesday','Wensday','Thursday','Friday','Saturday');

$y= '2008';

$x=0;



echo ('There are ' . $d .' days in ' . $m . ' ' . $y);

?>


<!-- MONTH/DAYs SWITCHER HTML //-->
<br /><br /><a href='?month=<?php echo $z + 1; ?>'>NEXT MONTH >></a>


<!-- HTML //-->
<table id='dayTable'>
<tr>
<!-- END HTML //-->


<?php
// LIST OUR DAYS NAMES

while($x<=6)
{
echo("<td>" . $dn[$x] . "</td>");
$x++;
}
?>

<!-- HTML //-->
</tr>
<tr>
<!-- END HTML //-->

<?php
// THE VARIABLES

$i=0;
$n="";
$MakeDayB= "<td><div id='Daybox'>";
$MakeDayE= "</div></td>";

// START THE LOOP TO BUILD THE CALENDAR
while($i<=34)
{
echo $MakeDayB . $n . $MakeDayE;
$i++;

// START MONTH SPECIFIC CHECKS
//JAN
if($i>=2&&$y=="2008"&&$m==$mL[0])
{
	$n++;
}

if($i>=$dL[0]+2&&$m==$mL[0])
{
$n="";
}
//FEB
if($i>=5&&$y=="2008"&&$m==$mL[1])
{
	$n++;
}

if($i>=$dL[1]+5&&$m==$mL[1])
{
$n="";
}
//MAR


//BREAK THE CALENDAR DOWN EVERY 7 DAYS
if ($i==7||$i==14||$i==21||$i==28)
{
echo("</tr><tr>");
}
else
{
echo("");
}
}

?>
<!-- HTML //-->
</tr>
</table>

[ag3nt42]

beautiful man.. u rock... thanx problem solved

[jonsjava]

Glad to help! Could you please click on the "Solved" Button?

[ag3nt42]

i was looking for a solved button i didn't think you guys had one here ... which button?

 

heh heh

 

found it