From ddf0530d44bf1e35322dbeb80e61c26134d0c014 Mon Sep 17 00:00:00 2001
From: whosphp <11045186+whosphp@users.noreply.github.com>
Date: Thu, 4 Aug 2022 14:08:38 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=AD=A3=200001.=E4=B8=A4=E6=95=B0?=
 =?UTF-8?q?=E4=B9=8B=E5=92=8C=20php=E7=89=88=E6=9C=AC=E5=AE=9E=E7=8E=B0?=
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---
 problems/0001.两数之和.md | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/problems/0001.两数之和.md b/problems/0001.两数之和.md
index a15e1349..5bedd0a0 100644
--- a/problems/0001.两数之和.md
+++ b/problems/0001.两数之和.md
@@ -263,13 +263,15 @@ php
 ```php
 function twoSum(array $nums, int $target): array
 {
-    for ($i = 0; $i < count($nums);$i++) {
-        // 计算剩下的数
-        $residue = $target - $nums[$i];
-        // 匹配的index，有则返回index， 无则返回false
-        $match_index = array_search($residue, $nums);
-        if ($match_index !== false && $match_index != $i) {
-            return array($i, $match_index);
+    $map = [];
+    foreach($nums as $i => $num) {
+        if (isset($map[$target - $num])) {
+            return [
+                $i,
+                $map[$target - $num]
+            ];
+        } else {
+            $map[$num] = $i;
         }
     }
     return [];