Ovulation period calculation method PHP various sorting algorithm implementation codes

Copy code The code is as follows:

// Function: PHP implements various sorting algorithms
// Author: windlike
// Datetime: 2007-06-09
// Bubble sort
function BubbleSort($arr){
$num = count($arr);
for($i=1;$i<$num;$i++){
for($j=$num-1;$j> =$i;$j--){
if($arr[$j]<$arr[$j-1]){
$iTemp = $arr[$j-1];
$arr[$j -1] = $arr[$j];
$arr[$j] = $iTemp;
}
}
}
return $arr;
}
// Exchange sorting
function ExchangeSort($arr){
$num = count($arr);
for($i=0;$i<$num-1;$i++){
for($j=$i+1;$j<$num;$j++){
if($arr[$j]<$arr[$i]){
$iTemp = $arr[$i];
$arr[$i] = $arr[$j];
$arr[$ j] = $iTemp;
}
}
}
return $arr;
}
//Selection sorting
function SelectSort($arr){
$num = count($arr);
for($i=0 ;$i<$num-1;$i++){
$iTemp = $arr[$i];
$iPos = $i;
for($j=$i+1;$j<$num;$j++ ){
if($arr[$j]<$iTemp){
$iTemp = $arr[$j];
$iPos = $j;
}
}
$arr[$iPos] = $arr[ $i];
$arr[$i] = $iTemp;
}
return $arr;
}
// Insertion sorting
function InsertSort($arr){
$num = count($arr);
for ($i=1;$i<$num;$i++){
$iTemp = $arr[$i];
$iPos = $i-1;
while(($iPos>=0) && ($iTemp< ;$arr[$iPos])){
$arr[$iPos+1] = $arr[$iPos];
$iPos--;
}
$arr[$iPos+1] = $iTemp;
}
return $arr;
}
// Quick sort
function QuickSort($arr){
$num = count($arr);
$l=$r=0;
for($i=1;$i< $num;$i++){
if($arr[$i] < $arr[0]){
$left[] = $arr[$i];
$l++;
}else{
$right[ ] = $arr[$i];
$r++;
}
}
if($l > 1){
$left = QuickSort($left);
}
$new_arr = $left;
$new_arr[ ] = $arr[0];
if($r > 1){
$right = QuickSort($right);
}
for($i=0;$i<$r;$i++){
$ new_arr[] = $right[$i];
}
return $new_arr;
}
$arr = array(7,1,6,5,2);
$arr_new = QuickSort($arr);
echo "

"; <br>print_r($arr_new); <br>echo "

";
?>

The above introduces the ovulation period calculation method and PHP various sorting algorithm implementation codes, including the ovulation period calculation method. I hope it will be helpful to friends who are interested in PHP tutorials.