Jul 3, 2022 · May 24, 2022 · May 24, 2022 · May 24, 2022 · May 24, 2022 · May 24, 2022
diff --git a/problems/0151.翻转字符串里的单词.md b/problems/0151.翻转字符串里的单词.md
Original file line number	Diff line number	Diff line change
Expand Up		@@ -761,6 +761,53 @@ func reverseWord(_ s: inout [Character]) {



	PHP:
	```php
	function reverseWords($s) {
	$this->removeExtraSpaces($s);
	$this->reverseString($s, 0, strlen($s)-1);
	// 将每个单词反转
	$start = 0;
	for ($i = 0; $i <= strlen($s); $i++) {
	// 到达空格或者串尾,说明一个单词结束。进行翻转。
	if ($i == strlen($s) \|\| $s[$i] == ' ') {
	// 翻转,注意是左闭右闭 []的翻转。
	$this->reverseString($s, $start, $i-1);
	// +1: 单词与单词直接有个空格
	$start = $i + 1;
	}
	}
	return $s;
	}

	// 移除多余空格
	function removeExtraSpaces(&$s){
	$slow = 0;
	for ($i = 0; $i < strlen($s); $i++) {
	if ($s[$i] != ' ') {
	if ($slow != 0){
	$s[$slow++] = ' ';
	}
	while ($i < strlen($s) && $s[$i] != ' ') {
	$s[$slow++] = $s[$i++];
	}
	}
	}
	// 移动覆盖处理,丢弃多余的脏数据。
	$s = substr($s,0,$slow);
	return ;
	}

	// 翻转字符串
	function reverseString(&$s, $start, $end) {
	for ($i = $start, $j = $end; $i < $j; $i++, $j--) {
	$tmp = $s[$i];
	$s[$i] = $s[$j];
	$s[$j] = $tmp;
	}
	return ;
	}
	```


		-----------------------
Expand Down