PHP How to access array data - php

Question

I get passed an array in a callback function. Now I want access a value of this array.
I can dump this array into a file with var_export($fields[1], True)
Here is the content of the export:
helper_plugin_bureaucracy_fieldtextbox::__set_state(array(
'mandatory_args' => 2,
'opt' =>
array (
'cmd' => 'textbox',
'label' => 'Kunde',
'display' => 'Kunde',
'value' => 'myimportantdata',
),
'tpl' =>
array (
'_elem' => 'textfield',
'_text' => '##DISPLAY##',
'_class' => '##CLASS##',
'id' => '##ID##',
'name' => '##NAME##',
'value' => '##VALUE##',
'class' => 'edit required',
'required' => 'required',
),
'checks' =>
array (
),
'hidden' => false,
'error' => false,
'checktypes' =>
array (
'/' => 'match',
'<' => 'max',
'>' => 'min',
),
))
I want to access the value of opt->value whitch is 'myimportantdata' in this case.
How can I achieve this?
I already tried:
$mydata = $fields[1]['helper_plugin_bureaucracy_fieldtextbox']['opt'];
$mydata = $fields[1][0][2];
$mydata = $fields[1]->helper_plugin_bureaucracy_fieldtextbox['opt'];
without success :-(

Answer 1

fields[1] contains an object of the type 'helper_plugin_bureaucracy_fieldtextbox'. The access to the properties of the object such as 'opt' must be done with the -> operator.
$opt = $fields[1]->opt;
$opt_value = $fields[1]->opt['value']; //myimportantdata

Answer 2

$data = array(
'mandatory_args' => 2,
'opt' =>
array (
'cmd' => 'textbox',
'label' => 'Kunde',
'display' => 'Kunde',
'value' => 'myimportantdata',
),
'tpl' =>
array (
'_elem' => 'textfield',
'_text' => '##DISPLAY##',
'_class' => '##CLASS##',
'id' => '##ID##',
'name' => '##NAME##',
'value' => '##VALUE##',
'class' => 'edit required',
'required' => 'required',
),
'checks' =>
array (
),
'hidden' => false,
'error' => false,
'checktypes' =>
array (
'/' => 'match',
'<' => 'max',
'>' => 'min',
),
);
echo $data["opt"]["value"];