From 0281b82d48a4f21429d35a89270843357f801c15 Mon Sep 17 00:00:00 2001
From: SevenMonths <qinwen_shuai@163.com>
Date: Mon, 16 May 2022 15:26:21 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0php=E7=89=88=E6=9C=AC?=
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---
 .../剑指Offer58-II.左旋转字符串.md    | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/problems/剑指Offer58-II.左旋转字符串.md b/problems/剑指Offer58-II.左旋转字符串.md
index fec83e1d..8781ffb4 100644
--- a/problems/剑指Offer58-II.左旋转字符串.md
+++ b/problems/剑指Offer58-II.左旋转字符串.md
@@ -290,6 +290,25 @@ func reverseString(_ s: inout [Character], startIndex: Int, endIndex: Int)  {
 }
 ```
 
+### PHP
+
+```php
+function reverseLeftWords($s, $n) {
+    $this->reverse($s,0,$n-1); //反转区间为前n的子串
+    $this->reverse($s,$n,strlen($s)-1); //反转区间为n到末尾的子串
+    $this->reverse($s,0,strlen($s)-1); //反转整个字符串
+    return $s;
+}
+
+// 按指定进行翻转 【array、string都可】
+function reverse(&$s, $start, $end) {
+    for ($i = $start, $j = $end; $i < $j; $i++, $j--) {
+        $tmp = $s[$i];
+        $s[$i] = $s[$j];
+        $s[$j] = $tmp;
+    }
+}
+```