Get MySQL Server Version with PDO

问题

I'm building out an app in Laravel 5 and I need to ensure that one of my tables will be able to perform FULLTEXT searches.

I'd like to detect the MySQL version number(ensuring it's at least 5.6.10 or above) so that I can switch the engine to MyISAM in my migration file for a given table, if that condition fails.

I can't seem to find any docs on how to access the MySQL server info using PDO, which is what Laravel uses out of the box.

Any help is appreciated.

回答1:

Why not just run select version(); query, which will give you all-correct result no matter which API you are using?

echo $pdo->query('select version()')->fetchColumn();

is throwing me not a single error

回答2:

You can use PDO::getAttribute(PDO::ATTR_SERVER_VERSION) http://php.net/manual/en/pdo.getattribute.php

回答3:

A little improved version of Vince Kronlein's answer

function version($min){
    $pdo = DB::connection()->getPdo();
    $version = $pdo->query('select version()')->fetchColumn();

    preg_match("/^[0-9\.]+/", $version, $match);

    $version = $match[0];

    return (version_compare($version, $min) >= 0);
}

Usage:

if(version('5.7.0')){
    //do someting
}

回答4:

I wrote a little method in my migration file:

protected static function version() 
{
    $pdo     = DB::connection()->getPdo();
    $version = $pdo->query('select version()')->fetchColumn();

    (float)$version = mb_substr($version, 0, 6);

    if ($version < '5.6.10') {
        return false;
    }

    return true;
}

Works a charm. Thanks for the comments.

来源：https://stackoverflow.com/questions/31788297/get-mysql-server-version-with-pdo

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php

mysql

laravel

pdo