php - 如何在php中调用函数/方法将函数返回值插入mysql

Question

<?php
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$email = $_POST['email'];

function random_string($length) {
    $key = '';
    $keys = array_merge(range(0, 9), range('a', 'z'));

    for ($i = 0; $i < $length; $i++) {
        $key .= $keys[array_rand($keys)];
    }

    return $key;
}

if($email)
{

$connect = mysql_connect(" HOST ", " USERNAME ", " PASSWORD") or die("Couldn't Connect");

mysql_select_db("CiniCraftData") or die ("Couldn't Find Database"); 

            $query = "INSERT INTO customers (fname, lname, email, alphanum) VALUES ('$fname', '$lname', '$email', 'random_string(10)')";
            $result = mysql_query($query) or die("Some kind of error occured.");

            echo ("Welcome " + $username + ", you are now in my database!");

}
else die("You did not fill out the fields correctly, please try again.");

?>

我需要有关中间以 $query = "INSER ... 'random_string(10)')"开头的行的帮助；

我需要将一个随机的字母数字字符串插入到名为“customers”的表中，但它没有调用函数“random_string()”，而是将“random_string(10)”插入到我的表中，这为我的表提供了 6字段:

5   John    Smith   Jogsz@CiniCraft.com random_string(10)   0

我该如何解决这个问题？

Answer 1

$query = "INSERT INTO customers (fname, lname, email, alphanum) VALUES ('$fname', '$lname', '$email', '" . random_string(10) . "')";

这应该有效!我认为即使双引号会解析变量，它们也不会解析函数。