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<?php $array = [ 'code' => 200, 'results' => [ 'id' => 1 ], 'a' => [ [ 'b' => [ 4, null, false ] ] ] ]; array_walk_recursive( $array, function(&$v) { if (is_numeric($v)) { $v = strval($v); } } ); echo json_encode($array);

This is an error 500

Value for `_results` contains invalid data `array`


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