PHP-> variable vars - arrays columns

Question

I have a function which receives unlimited number of arguments. (I am using func_get_args for that)

Example: function generate($one, $two, $three, ...)

Each one of the parameters represents a column in another array (let's call it $array).

I want to receive the value of the another array on $array[$one][$two][$three]

That means that the number of "[]" is unlimited

I have tried to generate a var in var for this.

<?php

  $ron = array("sir" => "yes");
  $name = 'ron["sir"]';
  echo var_dump(${$name});
?>

My result:

Notice: Undefined variable: ron["sir"] in C:\Users\ronr\Desktop\xampp\htdocs\lol.php on line 5 NULL

for what i am looking php.net/manual/en/… I am not sure it is possible to do it as you want to — Frankich
– Frankich, Commented Jun 11, 2019 at 9:39
Possible duplicate of stackoverflow.com/questions/33264853/… — 04FS
– 04FS, Commented Jun 11, 2019 at 9:43

Vitalii · Accepted Answer · 2019-06-11 11:09:13Z

1

If you want to use the args as a path to array value, you can try this:

$result = $array;
$args = func_get_args();

foreach($args as $arg) {
  $result = $result[$arg];
}

var_dump($result);

edited Jun 11, 2019 at 11:09

answered Jun 11, 2019 at 9:43

Vitalii

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1 Comment

Ron Rofe Over a year ago

Ive thought about something similar but didn't think It is the right way. Thank you very much!

Carl Binalla · Accepted Answer · 2019-06-11 09:53:41Z

1

Actually, the error is correct, you are defining a variable named ron["sir"], something like this:

${'ron["sir"]'} = 'foobar';
echo ${'ron["sir"]'};

. To show the value of sir in the $ron array, it should be:

$ron = array("sir" => "yes");
$name = 'ron';
var_dump(${$name}["sir"]);

edited Jun 11, 2019 at 9:53

answered Jun 11, 2019 at 9:33

Carl Binalla

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5 Comments

Ron Rofe Over a year ago

Hi, Thank you for trying to help. Please read the rest of my question. Thanks again

B001ᛦ Over a year ago

...read the rest of my question... What exactly do you mean? @RonRofe

Ron Rofe Over a year ago

If we have 4 arguments in the function - "hello", "its", "me", "here" ----- So I want to receive the value of the array on $array["hello"]["its"]["me"]["here"]

Frankich Over a year ago

I suppose the real question is "can I use an interpolation to access to an array"

Carl Binalla Over a year ago

@RonRofe what if the index does not exists? what will happen then?

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