Dynamically Generate Variables in a Loop

[tereglow]

Hello all,

 

I am trying to dynamically create variables in a loop.  For example:

 

myArray = array('Blue', 'Green', 'Yellow') {
for ($i = 0; $i < count($myArray); $i++) {
    $var.$i = "The color is $myArray[$i]";
}

 

What I'm looking to do is get "var1, var2, and var3" that I can then access outside of the loop.  These vars would be equal to the full, "My color is..." string.  The above generates an infinite loop of zeros for some reason.  Is there any way to do this in PHP?  I think I've done something similar in shell and possibly Perl.

 

Thank you for the help,

Tom

[per1os]

<?php
myArray = array('Blue', 'Green', 'Yellow') {
for ($i = 0; $i < count($myArray); $i++) {
    $newVar = 'var'. $i;
    $$newVar = "The color is $myArray[$i]";
}

echo $var1;
?>

[effigy]

Why do you need the variables? Why can't you reference the array?

[hitman6003]

You could also do:

 

myArray = array('Blue', 'Green', 'Yellow') {
for ($i = 0; $i < count($myArray); $i++) {
    ${"var" . $i} = "The color is $myArray[$i]";
}
echo $var1;

 

or

 

$var = "var_name";
myArray = array('Blue', 'Green', 'Yellow') {
for ($i = 0; $i < count($myArray); $i++) {
    ${$var . $i} = "The color is $myArray[$i]";
}
echo $var_name1;

[Trium918]

<?php
myArray = array('Blue', 'Green', 'Yellow') {
for ($i = 0; $i < count($myArray); $i++) {
    $newVar = 'var'. $i;
    $$newVar = "The color is $myArray[$i]";
}

echo $var1;
?>

 

There is no output from this!

[per1os]

<?php
myArray = array('Blue', 'Green', 'Yellow') {
for ($i = 0; $i < count($myArray); $i++) {
    $newVar = 'var'. $i;
    $$newVar = "The color is $myArray[$i]";
}

echo $var1;
?>

 

There is no output from this!

 

Wouldn't expect there to be with a syntax error.

 

<?php
$myArray = array('Blue', 'Green', 'Yellow'); // removed { added $ before myArray.
for ($i = 0; $i < count($myArray); $i++) {
    $newVar = 'var'. $i;
    $$newVar = "The color is $myArray[$i]";
}

echo $var1;
?>

[Psycho]

As effigy alluded to, this makes no sense. Why do you need to create distinct variables in the format $var1, $var2, etc. Why not just rereference the values in the format $arrayName[0], $arrayName[1], etc.

 

If you only wanted to create a variable for one or a couple values it might make sense, but not for all of them. Use the array.

[Trium918]

<?php
myArray = array('Blue', 'Green', 'Yellow') {
for ($i = 0; $i < count($myArray); $i++) {
    $newVar = 'var'. $i;
    $$newVar = "The color is $myArray[$i]";
}

echo $var1;
?>

 

There is no output from this!

 

Wouldn't expect there to be with a syntax error.

 

<?php
$myArray = array('Blue', 'Green', 'Yellow'); // removed { added $ before myArray.
for ($i = 0; $i < count($myArray); $i++) {
    $newVar = 'var'. $i;
    $$newVar = "The color is $myArray[$i]";
}

echo $var1;
?>

 

I caught the curly brace error but I over looked $ symbol. lol

[Trium918]

What is the purpose of creating a variable in a loop?