Question

我通过php将一些数据插入到mysql数据库中。问题是，当我尝试将空值插入到列中时，它不会像这样存储： NULL 并且它实际上将NULL保存为文本或当我从我的php脚本中删除if语句时它插入该列中的可用空间。这是我的PHP代码：

<?php

register();

function connectToDatabase(){
$connection=mysqli_connect("localhost","username","pass","db");
if (mysqli_connect_errno()) {
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_set_charset($connection,"utf8");
return $connection;
}


function register(){

$connection = connectToDatabase();
$OrgID = $_REQUEST['OrgID'];
$OrgName = $_REQUEST['OrgName'];
$OrgAddress = $_REQUEST['OrgAddress'];
$OrgPhone = $_REQUEST['OrgPhone'];


if($OrgName!=""){

    $check = mysqli_query($connection,"select count(*) from organization  where org_name='$OrgName'");
    $row = mysqli_fetch_array($check);
    if($row[0]>=1){

        print "old_user";

    }else {

        $result = mysqli_query($connection,"insert into organization (org_id,org_name,org_address,org_phone) values('$OrgID','$OrgName','$OrgAddress','$OrgPhone')");

        if($result!=""){
            print "ok";
        }else if($result==""){
            print "no";
        }

        mysqli_close($connection);
    }

}else {
    print "null";
}

}

?>

当我把if语句检查为这样时，它将NULL保存为文本：

if($OrgID == '')
{
    $OrgID = 'NULL';    
}

这是我的表结构：

CREATE TABLE IF NOT EXISTS `organization` (
`org_pid` int(11) NOT NULL AUTO_INCREMENT,
`org_id` varchar(16) DEFAULT NULL,
`org_name` varchar(45) NOT NULL,
`org_address` varchar(255) DEFAULT NULL,
`org_phone` varchar(45) NOT NULL,
 PRIMARY KEY (`org_pid`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=12 ;

Answer 1

null应设置为：

$OrgID = null;

即。没有引号。

NULL插入到具有Varchar数据类型的列中

1 个答案: