字符串中的preg_match数组项？

Question

可以说我有一堆坏话:

$badwords = array("one", "two", "three");

随机字符串:

$string = "some variable text";

如何创建此循环:

if (one or more items from the $badwords array is found in $string)
echo "sorry bad word found";
else
echo "string contains no bad words";

示例:
如果$string = "one fine day" or "one fine day two of us did something",用户应该看到抱歉坏词找到的消息.
如果$string = "fine day",用户应该看到字符串包含没有坏词的消息.

据我所知,你不能preg_match从数组.有什么建议吗？

Answer 1

这个怎么样:

$badWords = array('one', 'two', 'three');
$stringToCheck = 'some stringy thing';
// $stringToCheck = 'one stringy thing';

$noBadWordsFound = true;
foreach ($badWords as $badWord) {
  if (preg_match("/\b$badWord\b/", $stringToCheck)) {
    $noBadWordsFound = false;
    break;
  }
}
if ($noBadWordsFound) { ... } else { ... }

Answer 2

你为什么想在preg_match()这里使用？
那这个呢:

foreach($badwords as $badword)
{
  if (strpos($string, $badword) !== false)
    echo "sorry bad word found";
  else
    echo "string contains no bad words";
}

如果preg_match()由于某些原因需要,可以动态生成正则表达式模式.像这样的东西:

$pattern = '/(' . implode('|', $badwords) . ')/'; // $pattern = /(one|two|three)/
$result = preg_match($pattern, $string);

HTH