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2015-07-30 20:50
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PHP - 使用数据库搜索字符串LIKE语法/通配符（％，_）[重复]

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I have an application receiving search requests using the syntax of a database LIKE notation (ex: %someth_ng%), but I must be able to apply this search not only to a database (which is straightforward), but to strings in my application, which is in PHP.

I'm thinking that using a regex is probably the best way to do this, but I'd like to see what solutions other people can/have come up with.

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  • 在PHP中模拟LIKE 4 answers \ r

    我有一个应用程序使用数据库 LIKE 表示法的语法接收搜索请求（例如： ％someth_ng％），但我必须能够将此搜索不仅应用于数据库（这很简单），而且应用于我的应用程序中的字符串，即PHP中的字符串。 < 我正在考虑使用正则表达式可能是最好的方法，但我想看看其他人可以提出的解决方案。

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  • dsgni26260 2015-07-30 20:50
    最佳回答

    After a bit of work, this is the best I could come up with:

    public function like($needle, $haystack)
{
    // Escape meta-characters from the string so that they don't gain special significance in the regex
    $needle = preg_quote($needle, '~');

    // Replace SQL wildcards with regex wildcards
    $needle = str_replace('%', '.*', $needle);
    $needle = str_replace('_', '.', $needle);

    // Add delimiters, modifiers and beginning + end of line
    $needle = '~^' . $needle . '$~isu';

    return (bool) preg_match($needle, $haystack);
}

    I'm curious to see if there are any better solutions, or improvements to this one.

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