Is it possible to put a php variable inside $_POST['']?

Question

I was wondering if it's possible to put a PHP variable inside $_POST[''] like this:

$_POST[$variable];

I'm asking this because I have a page in which all the inputs have dynamic names according to how many orders the user has made and when I must retrieve their values through post, I never know the names but if I would have something like $_POST[$variable] I would know. The variable is a string and so it would turn out like $_POST['String'].

So is it possible to do something like this?

$numero = $count_ficha;
$countU = 1;

for ($i = 1;$i < $numero + 1;$i++) {
    $identificador = "identificadorNI".$countU;
    $identificador2 = "identificador".$countU;
    $id_subencomenda = $_POST[$identificador];
    $countU++;

    echo $id_subencomenda;
}

It's possible.. But since you will define the value for `$variable`, what's the difference? — FirstOne, Sep 18 '17 at 13:49
Maybe `foreach($_POST as $field => $value) {` would be useful for you. — chris85, Sep 18 '17 at 13:50
Yes i tried and nothing happened, i assumed it was because it didnt work. Also the variable's content will be constantly changing since it's in a loop. — Henrique, Sep 18 '17 at 13:52
Possible duplicate of [How to use variable inside the parameter of $\_POST in php](https://stackoverflow.com/questions/40386033/how-to-use-variable-inside-the-parameter-of-post-in-php) — Zakaria Shahed, Sep 18 '17 at 13:53
If the form fields are related, use arrays. [How to get form input array into PHP array](https://stackoverflow.com/questions/3314567/how-to-get-form-input-array-into-php-array) — FirstOne, Sep 18 '17 at 13:54

score 3 · Accepted Answer · answered Sep 18 '17 at 13:53

3

Yes, it is possible to use a variable inside $_POST[''] such as $_POST[$variable]

You will still be required, however, to define a value for $variable

answered Sep 18 '17 at 13:53

JJT

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Why the down vote for this answer? It is technically correct. I only ask so that I can better understand what my error is... – JJT Sep 18 '17 at 13:55

score 0 · Answer 2 · answered Sep 18 '17 at 14:05

It is posible, but if you don't know the key of $POST[] that you're trying to get the value of, how could you know what value that you have to put on $variable?

For unknow values, the best you can do is a foreach, so you can iterate all the $POST array and then you can do whatever you want with the values, like this

foreach ($_POST as $key) {
   //do whatever you want with the $key
}

Check PHP foreach

score -1 · Answer 3 · edited Sep 18 '17 at 14:01

-1

if you have a dynamic value for the page you just use some $variable because $_POST is use to send information from some HTTP POST method.

(http://php.net/manual/en/reserved.variables.post.php)

maybe you can resolve your problem by creating a global variable.

edited Sep 18 '17 at 14:01

Mehul Kuriya

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answered Sep 18 '17 at 13:55

colapiombo

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Is it possible to put a php variable inside $_POST['']?

3 Answers3