variable substitution

noodles101

Hi,

I've got an array with some variable names in it, and I want to be able to use the array items as if they where variables later on in the code. These variable may or may not have values assigned. Is there an enumerate variable function ?

Any help would be greatly appreciated.
Regards,
noods...

<?php

$myarray=array(
"title"=>"Form number 1",
"var1"=>"myvar1",
"var2"=>"myvar2"
);
$myarray2=array(
"title"=>"Form number 2",
"var1"=>"myvar3",
"var2"=>"myvar4"
);

$myvar2="test entry";

draw_form($myarray);
draw_form($myarray2);

function draw_form($frm){
Echo "<h3>" . $frm['title'] . "</h3>";
echo "<input type='input' value='" . $frm['var1'] . "'></br>";
echo "<input type='input' value='" . $frm['var2'] . "'></br>";
}
?>

laserlight

You could consider variable variables, but surely there is an easier way that does not involve using array items as variable names?

noodles101

I'm writing a formbuilder script which will have all the forms
elements in arrays (later in XML, get to grips with this stuff first..8) ) and I want to be able to use submitted/session values if they exist.

Noods.

noodles101

Whats a variable variable anyway ??

How does it work ?

Sorry, should have searched before asking that question.

so this should work, but again I'm not getting the value for $myvar2.

<?php

$myarray=array(
"title"=>"Form number 1",
"var1"=>"myvar1",
"var2"=>"myvar2"
);
$myarray2=array(
"title"=>"Form number 2",
"var1"=>"myvar3",
"var2"=>"myvar4"
);

$myvar2="hello";

draw_form($myarray);
draw_form($myarray2);

function draw_form($frm){
Echo "<h3>" . $frm['title'] . "</h3>";
echo "<input type='input' value='${$frm['var1']}'></br>";
echo "<input type='input' value='${$frm['var2']}'></br>";
}
?>

laserlight

Read the PHP Manual

noodles101

Thanks for your help Laserlight...I woulnd't have even thought of looking for variable variables.

I finally sorted it, but because I've had to redo the function to dynamically access the global variables for each item of the form I'll be creating.

Noods....

if anyones interested heres the final script:

<?php

$myarray=array(
	"title"=>"Form number 1",
	"var1"=>"myvar1",
	"var2"=>"myvar2"
	);
$myarray2=array(
	"title"=>"Form number 2",
	"var1"=>"myvar3",
	"var2"=>"myvar4"
	);

$myvar1="hello";
$myvar2="hellsdado"; 
$myvar3="this is a test";


draw_input($myarray,"var1","myvar1");
draw_input($myarray,"var2","myvar2");
draw_input($myarray2,"var1","myvar3");


function draw_input($frm,$gbs,$vlus){
global ${$vlus};	

$vr1=$frm[$gbs];

echo "<input type='input' value='" . ${$vr1} . "'></br>";
}
?>