PHP Array Exercises : Calculate and display average temperature
PHP Array: Exercise-9 with Solution
Write a PHP script to calculate and display average temperature, five lowest and highest temperatures.
Recorded temperatures : 78, 60, 62, 68, 71, 68, 73, 85, 66, 64, 76, 63, 75, 76, 73, 68, 62, 73, 72, 65, 74, 62, 62, 65, 64, 68, 73, 75, 79, 73
Sample Solution:
PHP Code:
<?php
$month_temp = "78, 60, 62, 68, 71, 68, 73, 85, 66, 64, 76, 63, 81, 76, 73,
68, 72, 73, 75, 65, 74, 63, 67, 65, 64, 68, 73, 75, 79, 73";
$temp_array = explode(',', $month_temp);
$tot_temp = 0;
$temp_array_length = count($temp_array);
foreach($temp_array as $temp)
{
$tot_temp += $temp;
}
$avg_high_temp = $tot_temp/$temp_array_length;
echo "Average Temperature is : ".$avg_high_temp."
";
sort($temp_array);
echo "
List of five lowest temperatures :";
for ($i=0; $i< 5; $i++)
{
echo $temp_array[$i].", ";
}
echo "
List of five highest temperatures :";
for ($i=($temp_array_length-5); $i< ($temp_array_length); $i++)
{
echo $temp_array[$i].", ";
}
?>
Sample Output:
Average Temperature is : 70.6 List of five lowest temperatures : 60, 62, 63, 63, 64, List of five highest temperatures : 76, 78, 79, 81, 85,
Flowchart:
PHP Code Editor:
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Previous: Write a PHP script to sort the specified associative array.
Next: Write a PHP program to sort an array of positive integers using the Bead-Sort Algorithm.
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($a, $b) { return $a['order'] - $b['order']; } usort($myArray, 'sortByOrder');
Starting in PHP 5.3, you can use an anonymous function:
usort($myArray, function($a, $b) { return $a['order'] - $b['order']; });
And finally with PHP 7 you can use the spaceship operator:
usort($myArray, function($a, $b) { return $a['order'] <=> $b['order']; });
To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.
usort($myArray, function($a, $b) { $retval = $a['order'] <=> $b['order']; if ($retval == 0) { $retval = $a['suborder'] <=> $b['suborder']; if ($retval == 0) { $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder']; } } return $retval; });
If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual
Ref : https://bit.ly/3i77vCC
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