admin

从mysql数据库回显特定的行

sql

我创建了一个表单,要求用户添加:first_name,last_name,location,status

一段时间后,我收到了5个输入。mysql表被命名为users,表数据如下:

id first_name location status  
== ========== ======== ========  
1   Chris       UK       Married  
2   Anton       Spain    Single  
3   Jacob       UK       Single  
4   Mike        Greece   Married  
5   George      UK       Married

同样,我通过POST方法接收输入的方式。所以:

$firstname=$_POST['FIRST_NAME']; // First Name: <input type="text" name="FIRST_NAME">
$location=$_POST['LOCATION']; // Location: <input type="text" name="LOCATION">
$status=$_POST['STATUS']; // Status: <input type="text" name="STATUS">

我创建了一个查询来选择来自英国的所有已婚用户:

$query = "SELECT * FROM users WHERE location='UK' AND status='Married'";
$result = mysqli_query($dbc,$query); //$dbc is the connection to my database

$row = mysqli_fetch_array($results, MYSQLI_BOTH);

换一种说法:

id first_name location status  
== ========== ======== ========  
1   Chris       UK       Married  
5   George      UK       Married

问题:

1)$ row数组是否如下图所示:

$row= array(
array(1 Chris UK Married),
array(5 George UK Married) 
);

2)在实施过滤后,我如何回显数据库的内容WHERE location =’UK’AND status =’Married’?

我需要它是这样的:

Hello Chris! You are from UK and you are married!

Hello George! You are from UK and you are married!

我知道我必须使用foreach循环(echo数组),但是我已经尝试过了,但它不起作用。我尝试的一件事是在php.net中找到的东西:

用list()解开嵌套数组

(PHP 5> = 5.5.0)

PHP 5.5通过提供list()作为值,增加了遍历数组数组并将嵌套的数组解包到循环变量中的功能。

例如:

<?php
$array = [
[1, 2],
[3, 4],
];

foreach ($array as list($a, $b)) {
// $a contains the first element of the nested array,
// and $b contains the second element.
echo "A: $a; B: $b\n";
}
?>

当我使用以上内容时,我收到以下错误:

Parse error: syntax error, unexpected T_LIST in C:\wamp\www....

有什么建议?

据我了解,我必须以某种方式将ID与其他数据相关联。

提前致谢。


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2021-07-01

共1个答案

admin

您可以使用如下所示的内容:

$query = "SELECT * FROM users WHERE location='UK' AND status='Married'";
$result = mysqli_query($dbc,$query);

while($row = mysqli_fetch_array($result, MYSQLI_BOTH)){
    printf("Hello %s! You are from %s and you are %s!\n", $row['first_name'], $row['location'],$row['status']);
}
2021-07-01