PHP Searching and Sorting Algorithm: Selection sort
PHP Searching and Sorting Algorithm: Exercise-4 with Solution
Write a PHP program to sort a list of elements using Selection sort.
The selection sort improves on the bubble sort by making only one exchange for every pass through the list.
Pictorial Presentation : Selection Sort
Sample Solution :
PHP Code :
<?php
function selection_sort($data)
{
for($i=0; $i<count($data)-1; $i++) {
$min = $i;
for($j=$i+1; $j<count($data); $j++) {
if ($data[$j]<$data[$min]) {
$min = $j;
}
}
$data = swap_positions($data, $i, $min);
}
return $data;
}
function swap_positions($data1, $left, $right) {
$backup_old_data_right_value = $data1[$right];
$data1[$right] = $data1[$left];
$data1[$left] = $backup_old_data_right_value;
return $data1;
}
$my_array = array(3, 0, 2, 5, -1, 4, 1);
echo "Original Array :\n";
echo implode(', ',$my_array );
echo "\nSorted Array :\n";
echo implode(', ',selection_sort($my_array)). PHP_EOL;
?>
Sample Output:
Original Array : 3, 0, 2, 5, -1, 4, 1 Sorted Array : -1, 0, 1, 2, 3, 4, 5
Flowchart :

PHP Code Editor:
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Next: Write a PHP program to sort a list of elements using Shell sort.
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