Language feature of PHP: A variable variable takes the value of a variable and treats that as the name of a variable.
Language feature of PHP: A variable variable takes the value of a variable and treats that as the name of a variable.
Questions tagged [variable-variables]
165 questions
426
votes
16 answers
How do I create variable variables?
How do I accomplish variable variables in Python?
Here is an elaborative manual entry, for instance: Variable variables
I hear this is a bad idea in general though, and it is a security hole in PHP. Is that true?
Pyornide
109
votes
8 answers
"Variable" variables in JavaScript
I know it's possible in PHP to have "variable" variables. For example,
$x = "variable";
$$x = "Hello, World!";
echo $variable; // Displays "Hello, World!"
Is it possible to refer to a variable by its name as a string in JavaScript? How would it be…
ShoeLace1291
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How do I import variable packages in Python like using variable variables ($$) in PHP?
I want to import some package depending on which value the user chooses.
The default is file1.py:
from files import file1
If user chooses file2, it should be :
from files import file2
In PHP, I can do this using variable variables:
$file_name =…
skargor
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what is "$$" in PHP
I saw this code
if (is_null($$textVarName)) {
$$textVarName = $_defaultTexts[$type];
}
what is code "$$" ?
meotimdihia
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How do I dynamically create the variable name in a PHP loop?
Ok so i have this php foreach loop
rows as $step) { ?>
and $step will be the step numbers 1, 2, 3, 4, 5 up to the total steps
within the loop i a need to set the value of the images within the loop to standard_image_1…
Matt Elhotiby
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votes
3 answers
java String to class
I have got a bean class named Bean1. In my main method I have got a string containing the name of the variable:
String str= "Bean1";
Now how can I use the String variable to get the class and access the Bean properties?
MANU SINHA
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What's an actual use of variable variables?
Variable variables seem pretty cool, but I can't think of a scenario where one would actually use them in a production environment. What would such a scenario be? How were they used?
user151841
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How to check if a string can be used as a variable name in PHP?
In PHP one can use variable variables...
For example...
class obj { }
$fieldName = "Surname";
$object = new obj();
$object->Name = "John";
$object->$fieldName = "Doe";
echo "{$object->Name} {$object->Surname}"; // This echoes "John Doe".
However,…
Kornelije Petak
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Is the dollar sign in a variable variable considered the dereference operator?
I was showing someone how you can create variable variable variables in PHP (I'd only recommend using them NEVER, it's horrible practice and you are a bad person if you use variable variable variables in actual production code), and they asked if…
Cyclone
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Javascript's equivalent to PHP's $$varName
Possible Duplicate:
How to access javascript variable value by creating another variable via concatenation?
In PHP I can have:
$theVariable = "bigToe";
$bigToe = "is broken";
such that:
echo "my ".$theVariable." ".$$theVariable;
would…
Aaron Luman
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1 answer
variable-variables in PHP
I know you can do: $hash('foo') and $$foo and also $bar[$foo], what are each of these things called?
Johnny
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Variable variables handling order: changes in PHP 7
With the new PHP 7.0.0 out now, I'm a bit worried about the changes in evaluation order of the so-called 'variable variables'.
On this page, under 'Changes to variable handling', a table is displayed with examples of expressions with their handling…
Marten Koetsier
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Variable variable class extensions in PHP--is it possible?
Is something like the following possible in PHP?
$blah = 'foo1';
class foo2 extends $blah {
//...
}
class foo1 {
//...
}
This gives an error.
I want to dynamically set $blah so I can extend whatever class I want.
Edit: The reason for…
Darryl Hein
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When to use a variable variable in PHP?
I've been developing in PHP for a while now, and I still have not had a task where I've had to use variable variables. Can anyone give me examples where using them is a good idea ? Or were they included in the language just for fun ?
sjobe
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PHP $_GET/$_POST via variable variables
I'm attempting to dynamically access both the $_GET and $_POST arrays, among others, using variable variables. The reason I'm trying to do this is so that I can perform similar actions on multiple arrays without needing to declare specific…
mseancole
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