RectangleOverlap.php

<?php

namespace App;

/**
 * Rectangle Overlap
 *
 * An axis-aligned rectangle is represented as a list [x1, y1, x2, y2], where (x1, y1) is the coordinate of its
 * bottom-left corner, and (x2, y2) is the coordinate of its top-right corner. Its top and bottom edges are parallel to
 * the X-axis, and its left and right edges are parallel to the Y-axis.
 * Two rectangles overlap if the area of their intersection is positive. To be clear, two rectangles that only touch at
 * the corner or edges do not overlap.
 * Given two axis-aligned rectangles rec1 and rec2, return true if they overlap, otherwise return false.
 *
 * Example 1:
 * Input: rec1 = [0,0,2,2], rec2 = [1,1,3,3]
 * Output: true
 *
 * Example 2:
 * Input: rec1 = [0,0,1,1], rec2 = [1,0,2,1]
 * Output: false
 *
 * Example 3:
 * Input: rec1 = [0,0,1,1], rec2 = [2,2,3,3]
 * Output: false
 *
 * https://leetcode.com/problems/rectangle-overlap
 */
class RectangleOverlap
{
    /**
     * @param int[] $rec1
     * @param int[] $rec2
     * @return bool
     */
    public function isRectangleOverlap(array $rec1, array $rec2): bool
    {
        return $rec1[0] < $rec2[2] && $rec1[1] < $rec2[3] && $rec1[2] > $rec2[0] && $rec1[3] > $rec2[1];
    }
}