<?php $jsonString = <<<'EOT' { "result":[ { "type":"Residence", "street":"Piazza di Spagna", "city":"-4:0" }, { "type":"Residence", "street":"test", "city":"-4:1" } ] } EOT; $nodeNames = array_keys(json_decode($jsonString, true)['result'][0]); print_r($nodeNames);
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