regex：除这些单词外，如何匹配这些单词？

Question

I want to match some words in regex except some others:

ex: all words that contains straat, laan, baan

(straat|laan|baan)

But not

(overslaan|bestraat|rubaan)

ex: mystraat bolaan overslaan boobaan rubaan

should match

mystraat bolaan boobaan

Answer 1

That's a bit complex but can be done with a negative lookbehind.

Try something like this:

$goodString = "coolbaan";
$badString = "rubaan";

$stringToTest = $goodString;

$regexPattern = '/(.*?)((?<!overs|ru|be)(straat|laan|baan))/';

preg_match($regexPattern, $stringToTest, $matches);
if ($matches) {
  // $matches[1] will be the prefix - e.g. ru
  // $matches[2] will be the suffix e.g. baan
  // $result will be 'rubaan'
  $result = "{$matches[1]}{$matches[2]}";
} else {
  $result = 'No Match!';
}
echo $result;

Answer 2

只需在正则表达式和$之前添加^，以结束下面的代码：

/^[straat|laan|baan]$/