3v4l.org

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<?php function dot($array, $prepend = '') { $results = array(); if (!$array) return $prepend; foreach ($array as $key => $value) { if (is_array($value)) { $results = array_merge($results, dot($value, $prepend.$key.'.')); if ($key === 'foo') print_r($results); } else { $results[$prepend.$key] = $value; } } return $results; } $array = [ 'foo' => [], 'bar' => [ 'baz' => 1 ], ]; print_r(dot($array, 'prefix'));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, string given in /in/C95dL:12 Stack trace: #0 /in/C95dL(12): array_merge(Array, 'prefixfoo.') #1 /in/C95dL(34): dot(Array, 'prefix') #2 {main} thrown in /in/C95dL on line 12
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_merge(): Expected parameter 2 to be an array, string given in /in/C95dL on line 12 Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/C95dL on line 12
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: array_merge(): Argument #2 is not an array in /in/C95dL on line 12 Warning: array_merge(): Argument #1 is not an array in /in/C95dL on line 12
Output for 4.4.2 - 4.4.9, 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/C95dL on line 26
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/C95dL on line 26
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/C95dL on line 26
Process exited with code 255.
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