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<?php
function clockwise($matrix) {
$result = [];
$row_start = 0;
$row_end = count($matrix) - 1;
$col_start = 0;
$col_end = count($matrix[0]) - 1;
while ($row_start <= $row_end && $col_start <= $col_end) {
// Traverse the top row
for ($i = $col_start; $i <= $col_end; $i++) {
$result[] = $matrix[$row_start][$i];
}
$row_start++;
// Traverse the right column
for ($i = $row_start; $i <= $row_end; $i++) {
$result[] = $matrix[$i][$col_end];
}
$col_end--;
// Check if there are remaining rows
if ($row_start <= $row_end) {
// Traverse the bottom row
for ($i = $col_end; $i >= $col_start; $i--) {
$result[] = $matrix[$row_end][$i];
}
$row_end--;
}
// Check if there are remaining columns
if ($col_start <= $col_end) {
// Traverse the left column
for ($i = $row_end; $i >= $row_start; $i--) {
$result[] = $matrix[$i][$col_start];
}
$col_start++;
}
}
return $result;
}
// Example usage
$matrix = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]
];
$result = clockwise($matrix);
print_r($result);
?>
In this code, we define a function called clockwise() that takes a matrix as input and returns the elements of the matrix in clockwise order. The function uses four variables to keep track of the boundaries of the matrix: $row_start, $row_end, $col_start, and $col_end.
We then use a while loop to iterate over the matrix in a clockwise direction. Within the loop, we use four for loops to traverse the top row, right column, bottom row (if applicable), and left column (if applicable) of the matrix. The elements are added to the $result array.
Finally, we return the $result array, which contains the elements of the matrix in clockwise order.
I've also included an example usage of the clockwise() function with a 3×3 matrix. You can modify the $matrix variable to test the function with different matrices.
Remember to replace the existing code in your 'wp-plugin.php' file with this updated code snippet.