我如何preg_match多個單詞

Question

我試圖使輸入不是模式。

$input= "words trying to compare"; 

preg_match("/\b{$input}\b/", "these are a lot of words that i'm trying to compare") 
       // ^this might contain multiple words, but the same as ^^ these 
echo "match is found"; 

我怎樣才能使它的，即使輸入單詞不在相同的順序一句我試圖把它比，它可以返回「發現匹配。」

Answer 1

只需使用preg_match_all

preg_match_all("/\b{$input}\b/", "these are a lot of words that i'm trying to compare",$matchedWords); 

多個單詞：

<?php 
$input= "words compare"; 
$pattern = str_replace(" ","|",$input); 
preg_match_all("/{$pattern}/", "these are a lot of words that i'm trying to compare words",$matchedWords); 
       // ^this might contain multiple words, but the same as ^^ these 
var_dump($matchedWords); 

Answer 2

$input= "words|trying|to|compare"; 
$count = preg_match_all('#\b('.$input.')\b#', $string, $matches); 

if($count) 
echo 'found word'; 
else 
echo 'not found';