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 git.master, git.master_jit, rfc.property-hooks
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.

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