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I am using php to connect to my psql database and have some initial code to connect to a database, access a table and set a column to an array etc. I, however, have been struggling to get my data into a desired format that my code is already running on. My input is in Json hierarchical data form, as following. function getData() { return { "name": "data", "children": [ { "name": "America", "children": [ { "name": "MA", "children": [ {"name": "Westborough", "order": 30}, {"name": "Southborough", "order":20} ] }, { "name": "NH", "children": [ {"name": "Nashua", "order": 12} ] }, { "name": "CA", "children": [ {"name": "SanFransico", "order": 17} ] } ] } ] }; This is the code I currently have using php: <?php // attempt a connection $dbh = pg_connect("host=localhost dbname=sample user=postgres"); if (!$dbh) { die("Error in connection: " . pg_last_error()); } // execute query $sql = "SELECT * FROM dataset"; $result = pg_query($dbh, $sql); if (!$result) { die("Error in SQL query: " . pg_last_error()); } //Sets the column at 1 to an array $arr = pg_fetch_all_columns($result, 1); // free memory pg_free_result($result); // close connection pg_close($dbh); ?> This is the format of the database table Thanks in advance