Online PHP editor | output for Y4Jjc

<?php $p = '{"1":{"section_id":"1","section_left":"1","section_right":"48","section_level":"0","section_name":"Root","nflag":"1"},"2":{"section_id":"2","section_left":"2","section_right":"3","section_level":"1","section_name":"Node 1","nflag":"0"},"3":{"section_id":"3","section_left":"4","section_right":"23","section_level":"1","section_name":"Node 2","nflag":"1"},"7":{"section_id":"7","section_left":"5","section_right":"6","section_level":"2","section_name":"Subnode 1","nflag":"0"},"8":{"section_id":"8","section_left":"7","section_right":"18","section_level":"2","section_name":"Subnode 2","nflag":"1"},"15":{"section_id":"15","section_left":"8","section_right":"17","section_level":"3","section_name":"deeqee","nflag":"1"},"16":{"section_id":"16","section_left":"9","section_right":"16","section_level":"4","section_name":"r3r23r2r","nflag":"1"},"17":{"section_id":"17","section_left":"10","section_right":"15","section_level":"5","section_name":"gfgg","nflag":"1"},"19":{"section_id":"19","section_left":"11","section_right":"14","section_level":"6","section_name":"hgfhf","nflag":"1"},"20":{"section_id":"20","section_left":"12","section_right":"13","section_level":"7","section_name":"hghfgh","nflag":"0"},"9":{"section_id":"9","section_left":"19","section_right":"20","section_level":"2","section_name":"Subnode 3","nflag":"0"},"13":{"section_id":"13","section_left":"21","section_right":"22","section_level":"2","section_name":"adadasdd","nflag":"0"},"4":{"section_id":"4","section_left":"24","section_right":"41","section_level":"1","section_name":"Node 3","nflag":"1"},"10":{"section_id":"10","section_left":"25","section_right":"38","section_level":"2","section_name":"Subnode 1","nflag":"1"},"12":{"section_id":"12","section_left":"26","section_right":"37","section_level":"3","section_name":"Subsubnode 1","nflag":"1"},"21":{"section_id":"21","section_left":"27","section_right":"36","section_level":"4","section_name":"rerwr","nflag":"1"},"22":{"section_id":"22","section_left":"28","section_right":"35","section_level":"5","section_name":"hghf","nflag":"1"},"23":{"section_id":"23","section_left":"29","section_right":"34","section_level":"6","section_name":"nmbnmmm","nflag":"1"},"24":{"section_id":"24","section_left":"30","section_right":"33","section_level":"7","section_name":"qwewe","nflag":"1"},"25":{"section_id":"25","section_left":"31","section_right":"32","section_level":"8","section_name":"yyryrt","nflag":"0"},"11":{"section_id":"11","section_left":"39","section_right":"40","section_level":"2","section_name":"Subnode 2","nflag":"0"},"5":{"section_id":"5","section_left":"42","section_right":"43","section_level":"1","section_name":"Node 4","nflag":"0"},"6":{"section_id":"6","section_left":"44","section_right":"45","section_level":"1","section_name":"Node 5","nflag":"0"},"14":{"section_id":"14","section_left":"46","section_right":"47","section_level":"1","section_name":"dsadadd","nflag":"0"}}'; echo "<pre>"; //print_r(json_decode($p,true)); $newArr = []; foreach(json_decode($p,true) as $item) { if($item['section_level'] == 0) { echo $item['section_id']."\n"; } };