<?php
/*
给定一个单词列表，只返回可以使用在键盘同一行的字母打印出来的单词。键盘如下图所示。
示例：
输入: ["Hello", "Alaska", "Dad", "Peace"]
输出: ["Alaska", "Dad"]
*/
$words = ["Hello", "Alaska", "Dad", "Peace"];
$words = ["abdfs", "cccd", "a", "qwwewm"];
print_r(findWords($words));
// 查找字符串的首次出现 stristr 忽略大小写
function findWords($words)
{
$newArray = [];
$line = ["qwertyuiop", 'asdfghjkl', 'zxcvbnm'];
for ($i = 0; $i < count($words); $i++) {
$line1 = 0;
$line2 = 0;
$line3 = 0;
for ($j = 0; $j < strlen($words[$i]); $j++) {
if (stristr('qwertyuiop', $words[$i][$j]) != false) {
$line1 = $line1 + 1;
continue;
}
if (stristr('asdfghjkl', $words[$i][$j]) != false) {
$line2 = $line2 + 1;
continue;
}
if (stristr('zxcvbnm', $words[$i][$j]) != false) {
$line3 = $line3 + 1;
continue;
}
}
if ($line1 == strlen($words[$i]) or $line2 == strlen($words[$i]) or $line3 == strlen($words[$i])) {
$newArray[] = $words[$i];
}
}
return $newArray;
}
