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  1. <?php
  2.  
  3. $test = array(
  4.     'abc' => 123,
  5.     'def' => 456,
  6.     'test' => array(
  7.         123 => 'hip',
  8.         'hop' => null
  9.     )
  10. );
  11.  
  12. var_dump(flatten($test));
  13.  
  14.  
  15.  
  16. function flatten($arr, $prefix = '') {
  17. 	$out = [];
  18. 	foreach($arr as $key => $val){
  19. 		if(is_array($val))
  20. 			$out = array_merge($out, flatten($val, $prefix . $key . '.'));
  21. 		else
  22. 			$out[$prefix . $key] = $val;
  23. 	}	
  24. 	return $out;
  25. }
Success #stdin #stdout 0.02s 24448KB
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stdin
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Standard input is empty
stdout
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array(4) {
  ["abc"]=>
  int(123)
  ["def"]=>
  int(456)
  ["test.123"]=>
  string(3) "hip"
  ["test.hop"]=>
  NULL
}
https://ideone.com/3jPhVb
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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