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]
171 questions
3
votes
3 answers
Construct a PHP variable name based on other variable values and static text
I want to tell my function which variable to call based on the day of the week. The day of the week is stored in $s_day, and the variables I want to call changes based on which day it is.
e.g.
I've stored a string 'Welcome to the week' in…
jkramp
- 491
- 1
- 5
- 8
3
votes
2 answers
Using Variable for Property Name of Object - Javascript
saw a few answers related to this, but none answer this version of the subject in question.
Consider the following: (linkto: jsfiddle)
$(function(){
arrKeys = [];
objArr = [];
nameArr = ['name1','name2','name3','name4'];
descArr =…
Fezzik
- 45
- 1
- 3
3
votes
2 answers
Assign value to variable private static class property that is an array from inside class definition
I would like to access and assign values to private static class properties and I would like to do the assigning using the concept of 'variable variables'. Accessing works, but assigning does not work. I have tried the following:
class AClass {
…
DudeOnRock
- 3,685
- 3
- 27
- 58
3
votes
2 answers
def'ine a value with a dynamic name
So I want to pass a function to the "name" portion of def.
The problem is:
"First argument to def must be a Symbol"
I'm trying to for instance do:
(def serverNumber 5)
(def (str "server" serverNumber) {:id serverNumber :value 4939})
But I can't…
Riveascore
- 1,724
- 4
- 26
- 46
3
votes
1 answer
Variable Variables in PHP from required / included files
I am writing a MVC Framework (for the purpose of learning and discovery as opposed to actually intending to use it) and I have came across a slight problem.
I have a config.php file:
$route['default'] = 'home';
$db['host'] =…
Andrew Willis
- 2,289
- 3
- 26
- 53
3
votes
2 answers
Getting reference to array element where array is accessible as $obj->$propName
Suppose that we have this code (simplified example):
$propertyName = 'items';
$foo = new \stdClass;
$foo->$propertyName = array(42);
At this point I 'd like to write an expression that evaluates to a reference to the value inside the array.
Is it…
Jon
- 428,835
- 81
- 738
- 806
2
votes
4 answers
How would I call a method from a class with a variable?
Given this class:
class Tacobell{
public function order_taco(){
echo "3 Tacos, thank you.";
}
public function order_burrito(){
echo "Cheesy bean and rice, please";
}
}
$lunch = new…
Ryan Florence
- 13,361
- 9
- 46
- 63
2
votes
3 answers
PHP: setting session variables through variable variables
I would like to set a session variable with something akin to:
$key = '_SESSION[element]';
$$key = 'value';
This does indeed set $_SESSION['element'] equal to value, but it also seems to clear the rest of my $_SESSION variable, resulting in the…
Mala
- 14,178
- 25
- 88
- 119
2
votes
2 answers
How can I print $title1 $title2 $title3... using a for loop in PHP
I want to print these variables using a for loop:
user918672
- 21
- 1
2
votes
1 answer
Trying to access $_SERVER(or any global) variable from string name
Today I met such a terrible situation.
It seems this bug is related to PHP.
I'm trying to access to $_SERVER or another super global variables but from string name.
This version of implementation is working.
var_dump(${"_SERVER"}); // working
But…
Aaron Yordanyan
- 738
- 7
- 19
2
votes
1 answer
Variable Variables with array element values syntax
I want to create a session variable but the session variable name I want to be dynamic. So what I need is the proper syntax for a variable name that is a $_SESSION variable.
I have tried the code below which creates a variable variable name and…
Dave Lovely
- 67
- 1
- 7
2
votes
4 answers
PHP Globals access issue when using a variable variable
I have this line in a class function:
$this_value = eval("return $$existing_value;");
This gives me the value I need when the $$existing_value variable is set in the function, but I've found that I actually need to access the global scope in 99% of…
YsoL8
- 2,186
- 5
- 29
- 47
2
votes
6 answers
php get the variable name from other variable
look at this simple script please
$c1 = $_GET[c1];
$c2 = $_GET[c2];
$c3 = $_GET[c3];
$c4 = $_GET[c4];
$c5 = $_GET[c5];
for($i = 1;$i <=5;$i++)
{
echo $c{$i};//or something else here :/
}
how can i print tha values of variables?
Thanks
Simon
- 22,637
- 36
- 92
- 121
2
votes
1 answer
How to reach variable variables which has spaces?
I was curious about how to reach variable variables which contain spaces or special chars.
Is there a way to do ?
";
$days = 'saturday sunday';
$$days = 'days…
mirza
- 5,685
- 10
- 43
- 73
2
votes
2 answers
PHP - Difference in creating variable variables with brackets or double dollar signs?
From what I can tell in the PHP Manual, it doesn't seem like there is much difference between defining a variable variable with double brackets or double dollar signs.
$foo = 'hello';
$$foo = 'hi';
echo $hello; // 'hi'
$baz = 'goodbye';
${$baz} =…
Katrina
- 1,922
- 2
- 24
- 42