Getting an array value based on a variable

Question

I have the following example data array:

$data = [];
$data["general"]["login"] = "Auth"
$data["general"]["login_failed"]["err1"] = "First error"

and the following request var:

$reqvar = "['general']['login']";

I'd like to:

print_r($data{$reqvar});

which would translate as

print_r($data['general']['login']);

but it doesn't seems to work

I'm not willing to iterate over the full array, it doesn't make sense considering that I know the path of the value that I want to print.

Thank you

its working only you have to add semi-colon (;) example - $data["general"]["login"] = "Auth"; — shubham715
– shubham715, Commented Sep 26, 2016 at 11:12
Possible duplicate of How to reffer dynamically to a php ARRAY variable(s)? — Gectou4
– Gectou4, Commented Sep 26, 2016 at 11:21
I've found the solution > stackoverflow.com/questions/9628176/… — user3405598
– user3405598, Commented Sep 26, 2016 at 13:02

Fernando Miguel · Accepted Answer · 2016-09-26 11:26:48Z

1

First of all take a look on PHP documentation - Arrays:

"Both square brackets and curly braces can be used interchangeably for accessing array elements (e.g. $array[42] and $array{42} will both do the same thing in the example above)."

So I think you are trying something like that:

<?php

$data = [];
$data["general"]["login"] = "Auth";
$data["general"]["login_failed"]["err1"] = "First error";

$reqvar1 = 'general';
$reqvar2 = 'login';

print_r($data{$reqvar1}{$reqvar2});

I strongly suggest you to refactor your code. Take a look on:

Regards,

answered Sep 26, 2016 at 11:26

Fernando Miguel

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1 Comment

user3405598 Over a year ago

The $reqvar is needed to be dynamic

Eugene · Accepted Answer · 2016-09-26 11:14:59Z

-1

Translate both values to dot notation and then you can select item into array. For example

$data["general"]["login"] = "Auth";
$data["general"]["login_failed"]["err1"] = "First error";
$data = convertToDotNotaion($data);
// it should looks like
$data["general.login"] = "Auth";
$data["general.login_failed"]["err1"] = "First error";

Then convert your came same way. And you can access to value use next code:

$data[$reqvarConverted}]

This is function convertToDotNotaion you should implement it yourself

answered Sep 26, 2016 at 11:14

Eugene

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