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
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vote
2 answers
Streamlit dynamic UI to generate dynamic input widgets depending on value from a different input widget
I want to open this post as I can't find anything on the official documentation from streamlit or any resources that mentioned how to do this. After some trial and error I have figured out a way, and will post the answer below. This is a function…
Subaru Spirit
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3 answers
Obtaining a variable value when echoing its name inside a for loop
I'm learning and I've been stuck for so long now with something I believe is too simple, sorry if I'm right.
Please help me to evolve, here's my question:
I have coming from a form:
$text1 = $_POST['TEXT1'];
$text2 = $_POST['TEXT2'];
$text3 =…
user712027
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4 answers
What does ${$item} mean?
I'm not able to understand braces goal in the situation below and I find no serious documentation about braces usage.
See the example below:
$var = array('a','b','c','d');
foreach($var as $item){
${$item} = array();
}
I'm non…
alesdario
- 1,873
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2 answers
PHP - Variable Variables & array_merge() - not working
I have a bunch of arrays, which are stored in different variables like $required, $reserved, etc...
I would like to allow (inside a function) an array of options to be passed (like $options = array('required', 'reserved')), and that array would then…
geerlingguy
- 4,682
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3 answers
Variable variables as parameters of custom function in usort()
I've been playing around and seeing if I can set up a more dynamic method in PHP.
usort(
$dataset,
function($a, $b){
return strcasecmp($a[$this->parameters], $b[$this->parameters]);
}
);
This line would sort array elements in…
NulisDefo
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1 answer
How can I access a specific depth of an associative array with variable variables
I've been hitting my head on this problem for some time now. I am working on a piece of software that creates a tree from a MySQL result checking for changes between each row to decide where in the tree to put the new data.
I'm now at a dead end…
Francesco
- 429
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0 answers
Undefined variable on defining variable variables
I want to import data from a .json file into a PHP file and dynamically, by using variable variables and a foreach loop, define new variables. However, PhpStorm doesn't recognize my variables and give me Undefined variable warnings. What to…
MAChitgarha
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vote
2 answers
Is Variable Variable Possible?
My googlefu has failed me and I come to you for help:
Is VBA capable of having Variable Variables like PHP? I know that in PHP you can wait to declare a variable by using $$var.
Is it possible to do it in VBA? for example, is there a way that lets…
Overseer10
- 361
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6 answers
php string name as variable in array
how take string from array define as new array,
how to code in php
$column = array("id","name","value");
let say found 3 row from mysql
want result to be like this
$id[0] = "1";
$id[1] = "6";
$id[2] = "10";
$name[0] = "a";
$name[1] = "b";
$name[2]…
Paisal
- 1,311
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1 answer
Are different PHP variable variables that resolve to the same variable name the same variable?
Let's say I have an array of strings that I use to create variable variables:
$var_arr = ["item1", "item2", "item3"];
foreach ($var_arr as $item) {
$$item = array();
}
Then elsewhere in my code I have to recreate the variable variable based on…
Troy D
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6 answers
PHP - Variable variables or array for variable inside for()
I have this code that generates an HTML table with php:
';
echo '';
for ($i = 1; $i <= 9; $i++) {
if($a1_pos_txt !== TRUE) {
echo "" . $numbers["a" . $i . "_pos"] . " ";
} else…
Trufa
- 39,971
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1
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2 answers
What happens when $$[object name] is declared?
I was trying to debug a PHP script when I came across a declaration like:
$cart = new form;
$$cart = $cart->function();
What is $$cart?
anand johi
- 11
- 1
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5 answers
javascript equivalent of php $$ dollar dollar
I have declared a local variable named cont in a function named validate.
I am calling a function process from inside validate.
I am sending the string 'cont' as argument to validate function.
In the process function using the string 'cont' i want…
Jayapal Chandran
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1 answer
Use variable variables with PHP's Superglobal arrays outside of function and class
I'm beginner of PHP, I found a Warning says:
Please note that variable variables cannot be used with PHP's Superglobal arrays within functions or class methods.
So, does it mean I can use variable variables with Superglobal outside of function and…
LIU YUE
- 1,593
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4 answers
Using variable variables to populate array results in error
I have the following code:
function filterUsers(array $setOfAllUsers) {
if (empty($setOfAllUsers)) {
return array(array(), array());
}
$activeUsers = array();
$inactiveUsers = array();
foreach($setOfAllUsers as $userRow) {
…
GGio
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