PHP正则表达式匹配字符串的单词列表

Question

我有一个数组中的单词列表.我需要在字符串中查找任何这些单词的匹配项.

示例单词列表

company
executive
files
resource

示例字符串

Executives are running the company

这是我写的功能,但它不起作用

$matches = array();
$pattern = "/^(";
foreach( $word_list as $word )
{
    $pattern .= preg_quote( $word ) . '|';
}

$pattern = substr( $pattern, 0, -1 ); // removes last |
$pattern .= ")/";

$num_found = preg_match_all( $pattern, $string, $matches );

echo $num_found;

产量

0

Answer 1

$regex = '(' . implode('|', $words) . ')';