<?php
$address = array(
"id" => 17570527.00,
"seq" => 0,
"line1" => "1 Heron Close",
"line2" => "Bradwell",
"post_town" => "Great Yarmouth",
"county" => "Norfolk",
"postcode" => "NR31 8LY",
"mailsort" => "54136",
"barcode" => "(NR318LY1AA)",
"is_residential" => 1,
"is_small_organisation" => 0,
"is_large_organisation" => 0,
);
$lines = array_intersect_key($address, array_flip(preg_grep('/^line[1-5]$/', array_keys($address))));
echo implode("\n", $lines);
preferences:
37.68 ms | 402 KiB | 5 Q