在SQLITE SELECT语句中使用的自定义REGEXP函数 [英] Custom REGEXP Function to be used in a SQLITE SELECT Statement

问题描述

我有一个SQLITE数据库文件，在表列之一中有一些简单的正则表达式.

I have an SQLITE Database's File which in one of the table columns there is some simple Regular Expressions.

这些表达式类似于/foo(.?)或/foo/bar/(.?)等.

These Expressions are something like /foo(.?) or /foo/bar/(.?) and so on...

好吧，当我们尝试将某些文本与常规模式匹配时，在PHP中，我们这样做:

Well, when we try to match some text against a Regular Pattern, in PHP, we do:

preg_match($ pattern，$ target，$ matches)

preg_match( $pattern, $target, $matches )

显然，用内容替换了变量.

Replacing the variables with the content, obviously.

我想做的是发送任何STRING作为WHERE子句的值，并且在搜索SQLITE数据库的文件时，使用每个存储的正则表达式来匹配给定字符串中的模式.

What I would like to do is send ANY STRING as value of a WHERE Clause and, when searching the SQLITE Database's File, use each of the stored Regular Expressions to match a pattern in the given string.

我认为使用PHP的sqlite_create_function()可以创建某种例程来执行此操作，但是我不知道具体如何做，因为这是我第一次使用SQLITE进行开发.

I think that using PHP's sqlite_create_function() I can create some kind of routine to do this, but I don't know exactly how, since is the first time I develop using SQLITE.

如果有兴趣，它是我正在开发的框架的MVC路由的一部分.

If interest, it's part of an MVC Routing of a Framework I'm developing.

非常感谢您.

推荐答案

您可以使用SQLiteDatabase::createFunction文档此处

You can use SQLiteDatabase::createFunction documentation here or PDO::sqliteCreateFunction documentation here

我做了这样的事情:

<?php
function _sqliteRegexp($string, $pattern) {
    if(preg_match('/^'.$pattern.'$/i', $string)) {
        return true;
    }
    return false;
}
$PDO->sqliteCreateFunction('regexp', '_sqliteRegexp', 2);
?>

使用:

SELECT route FROM routes WHERE pattern REGEXP 'your/url/string' LIMIT 1

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