Question

foreach ($_POST as $key => $value)之后的变量如title_1，title_2，title_3。我需要将$ title等同于$ title_ + $ id

我尝试了什么

            $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

你想要类似......

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

或者

${"title_" . $id};

参见此参考： http://php.net/manual/en/language.variables.variable.php

变量基于两个变量

1 个答案: