<?php $arr = array( "0"=>array("0"=>"joe", "1"=>"2018-07-18 09:00:00"), "1"=>array("0"=>"tom", "1"=>"2018-07-17 09:00:00"), "2"=>array("0"=>"joe", "1"=>"2018-07-14 09:00:00"), "3"=>array("0"=>"sam", "1"=>"2018-07-19 09:00:00"), ); usort($arr, function($a, $b) { return $a[1] <=> $b[1]; }); $joes = array_intersect(array_column($arr, 0), ["joe"]); $current = max(array_keys($joes)); Unset($arr[$current]); Var_dump($arr);
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