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  1. <?php
  2.    function getValue($key, $arr, $default=null) {
  3.        $pieces = explode('.', $key);
  4.        $array = $arr;
  5.  
  6.        foreach($pieces as $array_key) {
  7.  
  8.           if(!is_null($array) && is_array($array) && array_key_exists($array_key, $array)) { 
  9.               $array = $array[$array_key];
  10.           }
  11.           else {
  12.               $array = null;
  13.               break;
  14.           }
  15.        }
  16.        return is_null($array) ? $default : $array;
  17.    }
  18.  
  19.    $testarr = [
  20.    	    ['foobar' => 'baz'],
  21.    	    ['active' => false]
  22.    	];
  23.    $output = getValue('0.foobar',$testarr,'NOT FOUND');
  24.    var_dump($output);
  25.    $output = getValue('0',$testarr,'NOT FOUND');
  26.    var_dump($output);
  27.    $output = getValue('1.active',$testarr,'NOT FOUND');
  28.    var_dump($output);
  29.    $output = getValue('i.do.not.exist',$testarr,'NOT FOUND');
  30.    var_dump($output);
  31.  
Success #stdin #stdout 0s 82880KB
comments (?)
stdin
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Standard input is empty
stdout
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string(3) "baz"
array(1) {
  ["foobar"]=>
  string(3) "baz"
}
bool(false)
string(9) "NOT FOUND"
https://ideone.com/11jtzj
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
public

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