PHP - Read value from Current array

Question

I have an array that looks like this:

$data = array (
  "card" => array(
               "id" => $_GET["id"],
               "user" => dynamicFunction($_GET["id"]),
               "Origin" => $data["card"]["user"]
));

I'm getting an error here.

How can I read the value from current array element user without calling dynamicFunction again since that function will execute DB query again. I don't want to overload my SQL server with unnecessary queries.

Thanks in advance!

@u_mulder : I don't think it's same as Undefined variable. I'm looking for a solution which will help me in reading element from current array. I m not trying to read from an undeclared variable — Dev Aggarwal
– Dev Aggarwal, Commented Mar 2, 2018 at 6:51
Currently you have syntax error. replace $_GET("id") with $_GET["id"] — Adnan Haider
– Adnan Haider, Commented Mar 2, 2018 at 6:52
Oops! Sorry. Typo. But still my problem remains the same with element origin — Dev Aggarwal
– Dev Aggarwal, Commented Mar 2, 2018 at 6:54

u_mulder · Accepted Answer · 2018-03-02 07:01:42Z

2

Option 1:

$user = dynamicFunction($_GET["id"]);
$data = array (
    "card" => array(
        "id" => $_GET["id"],
        "user" => $user,
        "Origin" => $user,
));

Option 2:

$data = array (
    "card" => array(
        "id" => $_GET["id"],
        "user" => dynamicFunction($_GET["id"]),
));
$data["card"]['Origin'] = $data["card"]['user'];

Option 3:

$data = array (
    "card" => array(
        "id" => $_GET["id"],
        "user" => $user = dynamicFunction($_GET["id"]),
        "Origin" => $user,
));

And no, you cannot access item af array which is not yet initialized.

edited Mar 2, 2018 at 7:01

answered Mar 2, 2018 at 7:00

u_mulder

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3 Comments

Dev Aggarwal Over a year ago

Thank you for the answer. Can you please suggest which one is performance optimized?

u_mulder Over a year ago

Optimization is useless here. You won't gain anything. Choose variant that will be understandable when you will read your code 5-6 months later.

Dev Aggarwal Over a year ago

Well, I'll go with Option 3 then

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