Online PHP editor | output for X5Cje

@ 2019-10-25T06:35:59Z

<?php

  function mergeDeepArray(array $arrays, $preserve_integer_keys = FALSE) {
    $result = [];
    foreach ($arrays as $array) {
      foreach ($array as $key => $value) {
        // Renumber integer keys as array_merge_recursive() does unless
        // $preserve_integer_keys is set to TRUE. Note that PHP automatically
        // converts array keys that are integer strings (e.g., '1') to integers.
        if (is_int($key) && !$preserve_integer_keys) {
          $result[] = $value;
        }
        // Recurse when both values are arrays.
        elseif (isset($result[$key]) && is_array($result[$key]) && is_array($value)) {
          $result[$key] = mergeDeepArray([$result[$key], $value], $preserve_integer_keys);
        }
        // Otherwise, use the latter value, overriding any previous value.
        else {
          $result[$key] = $value;
        }
      }
    }
    return $result;
  }

$a = [['foo' => [2,3]], ['foo' => [4, 5]]];
print_r(mergeDeepArray($a)['foo']);
$a = [['foo' => new ArrayObject([2,3])], ['foo' => new ArrayObject([4, 5])]];
print_r((array)mergeDeepArray($a)['foo']);

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 5 ) Array ( [0] => 4 [1] => 5 )
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 5 ) Array ( [0] => 4 [1] => 5 )
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/X5Cje on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/X5Cje on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/X5Cje on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/X5Cje on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/X5Cje on line 3
Process exited with code 255.

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