[英]How to find highest ,second highest number, Lowest Second Lowest number from Array in PHP
Highest, second highest number and lowest or smallest and second lowest number from an array in php. php.ini 数组中最高、次高的数字以及最低或最小和次低的数字。
$array = array('2','1','200','15','300','500','69','422','399','201','299'); $array = array('2','1','200','15','300','500','69','422','399','201','299');
There are several ways in php to solve this problem. php中有几种方法可以解决这个问题。
$array = array('2','1','200','15','300','500','69','422','399','201','299');
//First order the array
sort($array);
$lowest = $array[0];
$secondLowest = $array[1];
$highest = $array[count($array)-1];
$SecondHighest = $array[count($array)-2];
echo "Lowest number is $lowest, Second lowest number is $secondLowest and Highest number is $highest, Seoncd highest is $SecondHighest";
$array = array('2','1','200','15','300','500','69','422','399','201','299');
$secondHighest=$highest=0;
for ($i=0; $i < count($array); $i++) {
if ($array[$i] > $highest ) {
$secondHighest=$highest;
$highest=$array[$i];
}elseif ( $array[$i] > $secondHighest ) {
$secondHighest= $array[$i];
}
}
echo "Highest number is $highest and Second highest number is $secondHighest.";
$array = array('2','1','200','15','300','500','69','422','399','201','299');
$lowest=$array[0];
$gotLowest=0;
$smallArray=[];
$secondLowest=0;
$lowestnext=0;
for ($i=0; $i < count($array); $i++) {
// find lowest value and run only first time
if($gotLowest == 0 ){
for ($k=0; $k < count($array) ; $k++) {
if ( intval($array[$k]) < $lowest ) {
$lowest= $array[$k]; //lowest value
}
}
$gotLowest=1; // change value so that run this condition only one time
}
if ( $lowestnext ==0 && intval($array[$i]) > $lowest) {
$lowestnext=$array[$i];
}
// find second smaller value from array
if ( $array[$i] > $lowest && $array[$i] <= $lowestnext ) {
$smallArray[] = $array[$i];
for ($j=0; $j < count($smallArray); $j++) {
if ( $smallArray[$j] < $secondLowest ) {
$secondLowest=$smallArray[$j];
}
}
$secondLowest=$smallArray[0];
}
}
echo "Lowest number is $lowest and Second Lowest number is $secondLowest.";
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