From a5a0a4d9dfffe2b586e3f893082f92ac815c065e Mon Sep 17 00:00:00 2001
From: Henry Wong <somethingweird@yahoo.com>
Date: Wed, 25 Nov 2020 12:41:32 -0500
Subject: Create ch-2.php

---
 challenge-088/henry-wong/php/ch-2.php | 53 +++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 challenge-088/henry-wong/php/ch-2.php

diff --git a/challenge-088/henry-wong/php/ch-2.php b/challenge-088/henry-wong/php/ch-2.php
new file mode 100644
index 0000000000..d5154c58f0
--- /dev/null
+++ b/challenge-088/henry-wong/php/ch-2.php
@@ -0,0 +1,53 @@
+<?php
+# 0. take row
+# 1. delete row
+# 2. rotate matrix 90 degrees
+# 3. repeat again till no matrix
+
+# 1. transpose matrix 
+# 2. reflect horizontal axis 
+
+$a = array(
+  array(1,2,3),
+  array(4,5,6),
+  array(7,8,9)
+);
+
+$c = array(
+  array( 1,  2,  3,  4 ),
+  array(5,  6,  7,  8 ),
+  array(9, 10, 11, 12 ),
+  array(13, 14, 15, 16)
+);
+
+function rotate($a) {
+  # transpose array
+  $b = array();
+  if (isset($a[0]) && is_array($a[0])) {
+    $column_size = count($a[0]);
+    for($i = 0; $i < $column_size; $i++) {
+      $b[] = array_column($a, $i);
+    };
+    # then reflect horizontal axis
+    $b = array_reverse($b);
+      
+  }
+  return $b;
+}
+
+function solution($a) {
+  $b = array();  
+  $shift = true;
+  while ($shift) {
+    $b = array_merge($b, array_values($a[0]));
+    array_shift($a);
+    if (empty($a)) {
+      $shift = false;
+    }
+    $a = rotate($a);
+  }
+  return $b;
+}
+
+print_r(solution($a));
+print_r(solution($c));
-- 
cgit