变量基于两个变量

Question

foreach ($_POST as $key => $value)我有像title_1,title_2,title_3这样的变量之后.我需要将$ title等同于$ title_ + $ id

我试过的

            $link = ${$title_ . $id};
            $title= $title_[$id];
            $title= $title_[$id];

代码

foreach ($_POST as $key => $value)
    {
     if (preg_match('/^id_(\d*)$/', $value, $matches))
        {
    $id = $matches[1];
        if (isset($_POST['title_' . $id]))
            {
                //$link = ${$title_ . $id};
                $title= $title_[$id];
                //mysql_query("UPDATE table SET title='" . $title . "' where id='$id'");

            }
    }
    }

}

Answer 1

你想要像......

$link = ${$title."_" . $id};

也许

${"title_" . $id};

请参阅此参考:http: //php.net/manual/en/language.variables.variable.php