<?php function sort_subnets($x, $y){ $x_arr = explode('.', $x); $y_arr = explode('.', $y); return $x_arr <=> $y_arr; } $subnet_list = array('192.169.12', '192.167.11', '192.169.14', '192.168.13', '192.167.12', '122.169.15', '192.167.16' ); usort($subnet_list, 'sort_subnets'); print_r($subnet_list);
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