Array_agg php to array

// Postgresql arrays look like this: {1,2,3,4}
$x = '{1,2,3,4}';
$y = json_decode('[' . substr($x, 1, -1) . ']');  // [1, 2, 3, 4]



// To cast back the other way would be mirror opposite:
$y = [1, 2, 3, 4];
$x = '{' . substr(json_encode($y), 1, -1) . '}';

Source: stackoverflow.com

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