Question

假设是，或和是是随机单词（前提是两个是相同），仅在此处表示：

我正在尝试使用正则表达式在任何地方匹配 YES ， OR 和 YES ，条件是 只有在字符串为2的情况下，字符串才必须匹配。 。

因此，如果我尝试使用以下测试字符串：

yes or yes
no or yes
yes or no
maybe yes or yes
maybe yes or no
yes maybe or yes
maybe yes maybe yes maybe or

它只能匹配以下内容：

yes or yes
maybe yes or yes
yes maybe or yes
maybe yes maybe yes maybe or

这是我正在处理的正则表达式查询：

^(?=.*(?=\w.*yes)(?=\w.*or)(?=\w.*yes)).*

很遗憾，我的查询仍然与no or yes相匹配。这是我的正则表达式链接：Click Here

Answer 1

为什么不呢？

^(?=.*\byes\b.+\byes\b)(?=.*\bor\b).+

第一个正向前行查找两个yes，第二个正则匹配or

demo on regex101

Answer 2

使用substr_count()

的非正则表达式

<?php
$string = 'yes or yes
no or yes
yes or no
maybe yes or yes
maybe yes or no
yes maybe or yes
maybe yes maybe yes maybe or';
$array =   explode("\n", $string);
$expected = [];
//print_r($array);
foreach($array as $line){
    $words = substr_count($line,'yes');
    if($words==2 && strpos($line, 'or') !== false ){
     $expected[]= $line;   
    }
}

echo implode("\n",$expected);

输出：

yes or yes
maybe yes or yes
yes maybe or yes
maybe yes maybe yes maybe or

演示： https://3v4l.org/uL7fJ

正则表达式匹配相同的单词

2 个答案: