获取两个或多个php字符串之间的匹配字符串

我有两条线，第一条是它的

$str1 = "Hi stackoverflow community, I am new user and i have question, can you help me please";
$str2 = "Hi gamers community, I am new user and i have question, any one can help me please";

我想提取所有超过（2）个单词的句子及其

社区，我是新用户，我有问题

及

请帮帮我

所以在搜索之后，我做了一些代码，比如madearray，把它推到相似的单词和单词位置，然后比较单词的位置，但是遇到了一些问题，所以我做了更多的搜索，找到了这个方法

function getLongestMatchingSubstring($str1, $str2)
{
    $len_1 = strlen($str1);
    $longest = '';
    $a = array();
    for($i = 0; $i < $len_1; $i++){
        for($j = $len_1 - $i; $j > 0; $j--){
            $sub = substr($str1, $i, $j);
            if (strpos($str2, $sub) !== false && strlen($sub) > strlen($longest)){
                $longest = $sub;
                $a[] = $sub;
                break;
            }
        }
    }
    return $a;
}

我们可以看到，

您能帮我一下吗

结果中不存在，因为if station

strlen（$sub）>strlen（$longest）

我试着编辑if语句，但失败了，给了我一个可怕的结果，比如

0 => string ' community, I am new user and i have question, ' (length=47)
  1 => string 'community, I am new user and i have question, ' (length=46)
  2 => string ' I am new user and i have question, ' (length=36)
  3 => string 'I am new user and i have question, ' (length=35)
  4 => string ' am new user and i have question, ' (length=34)
  5 => string 'am new user and i have question, ' (length=33)
  6 => string ' new user and i have question, ' (length=31)
  7 => string 'new user and i have question, ' (length=30)
  8 => string ' user and i have question, ' (length=27)
  9 => string 'user and i have question, ' (length=26)
  10 => string ' and i have question, ' (length=22)
  11 => string 'and i have question, ' (length=21)
  12 => string ' i have question, ' (length=18)
  13 => string 'i have question, ' (length=17)
  14 => string ' have question, ' (length=16)
  15 => string 'have question, ' (length=15)

第二个问题需要很长时间

---

这工作有对数吗？或者和想法对if语句进行一些编辑

我正在阅读你的问题，因为给出了一个超过两个单词的指针。找到包含它们的句子，如果我误解了，请纠正我

<?php

$sentences =
[
    'I like my rubber ducky.',
    'Paperclips make me happy, I have lots.'
];

$needle = 'make me happy';

foreach($sentences as $sentence) {
    if(strpos($sentence, $needle) !== false) {
        echo $sentence;
    }
}

---

也许给出输入和想要的输出的例子。我不太明白您想要达到的目的。@Progrock在两个字符串之间查找匹配项，这两个字符串都没有

$pinder

只是两个字符串比较并查找matches@dailytube，所以给出：

空间很大，真的很大，你不会相信空间有多大，它太大了。

而字符串

真的太大了

和

有多大

，如果它返回的话：

，你不会相信的

？你说的火柴是什么意思？

<?php

$sentences =
[
    'I like my rubber ducky.',
    'Paperclips make me happy, I have lots.'
];

$needle = 'make me happy';

foreach($sentences as $sentence) {
    if(strpos($sentence, $needle) !== false) {
        echo $sentence;
    }
}

Paperclips make me happy, I have lots.