Online PHP editor | output for QvruO

<?php $indexes = [ 26 => ["namespace" => "X\\Y\\Zed"], 9 => ["namespace" => "A\\B\\See"], 3 => ["namespace" => "A\\B\\Bee"], 38 => ["namespace" => "A\\B\\C\\Dee"], 51 => ["namespace" => "X\\Wye"], 16 => ["namespace" => "A\\Sea"], 12 => ["namespace" => "A\\Bees"], 31 => ["namespace" => "M"], ]; uasort( $indexes, function($a, $b) { $aParts = explode('\\', $a['namespace']); $bParts = explode('\\', $b['namespace']); $aCount = count($aParts); $bCount = count($bParts); return count($bParts) <=> count($aParts) ?: (array_pad($aParts, $bCount, '~') <=> array_pad($bParts, $aCount, '~')); } ); var_export($indexes);