PHP array binary search function code_PHP tutorial

Copy code The code is as follows:

//search function where $array is the array and $k is the desired The value to be found, $low is the minimum key value of the search range, $high is the maximum key value of the search range
function search($array, $k, $low=0, $high=0)
{
if(count($array)!=0 and $high == 0) //Determine whether this is the first call
{
$high = count($array);
}
if($low <= $high) //If there are remaining array elements
{
$mid = intval(($low+$high)/2); //Take $low and $high The middle value of array[$mid]) //If not found, continue searching
{
return search($array, $k, $low, $mid-1);
}
else
{
return search($array, $k, $mid+1, $high);
}
}
return -1;
}
$array = array( 4,5,7,8,9,10); //Test the search function
echo search($array, 8); //Call the search function and output the search results
?>





http://www.bkjia.com/PHPjc/321261.html

www.bkjia.com

truehttp: //www.bkjia.com/PHPjc/321261.htmlTechArticleCopy the code as follows: ?php //search function where $array is the array and $k is the value to be found , $low is the minimum key value of the search range, $high is the maximum key value of the search range function search(...