u011289446的专栏

$find){//目标数在左边 $end = $mid-1; } if($arr[$mid] < $find){//目标数在右边 $begin = $mid+1; } } return -1;}$index = binary($arr, $find);var_dump($index);

$arr = array(49, 38, 65, 97, 76, 13, 27); function quickSort($arr, $l, $r){ $p = floor(($l+$r)/2); $key = $arr[$p]; echo "p={$p}, key={$key} \n"; for($i=$l, $j=$r; $i!=$j; ){