为此，您将需要正则表达式和 preg_match 功能.

For this, you will need Regular Expressions and the preg_match function.

类似的东西:

if(preg_match('(bad|naughty)', $data) === 1) { } 

您的尝试失败的原因

正则表达式由PHP regex引擎解析.语法的问题是您使用了||运算符.这不是正则表达式运算符，因此将其计为字符串的一部分.

Regular Expressions are parsed by the PHP regex engine. The problem with your syntax is that you used the || operator. This is not a regex operator, so it is counted as part of the string.

正如上面正确指出的，如果它被视为您要匹配的字符串的一部分:'bad || naughty'作为字符串，而不是表达式！

As correctly stated above, if it's counted as part of the string you're looking to match: 'bad || naughty' as a string, rather than an expression!