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<?php function qsort($arr){ if(!isset($arr[1])){ return $arr; } $larr = $rarr = [];//初始化变量，确保它一定存在 for ($i=1; $i < count($arr); $i++) { //不用$i+1，而是修改初始值为1 if($arr[$i]<$arr[0]){ $larr[] = $arr[$i]; } if($arr[$i]>=$arr[0]){ $rarr[] = $arr[$i]; } } $larr = qsort($larr); $larr[] = $arr[0]; $rarr = qsort($rarr); return array_merge($larr,$rarr); } print_r(qsort(array(411,21,333,666)));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 21 [1] => 333 [2] => 411 [3] => 666 )

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