在php显示中选择

Question

$sqlQuery = "SELECT username as display_name, fullname as full_name, email as email, role as administrators, status as be_on FROM admin";

记录角色：0,1,...

我希望管理员的角色将显示 1 是 admin ，如果等于 0 ，则显示用户。

谁能帮我？

Answer 1

我认为你在寻找 IF 语句

SELECT IF(`admin`.`role`= 1,TRUE,FALSE) FROM ...

http://www.mysqltutorial.org/mysql-if-function.aspx

Answer 2

我的建议是像这样使用mysqli功能：

<?php
$mysqliClass = mysqli_init();
$mysqliClass->real_connect("hostname or IP", "dbUsername", "dbPassword", "databasename");

$query = "SELECT `username` AS display_name, `fullname` AS full_name, `email`, `role` as administrators, `status` as be_on FROM `admin`";
$rs = $mysqliClass->query($query); # Preform your query
$showUser = false; # Start negative
$row = []; # Set a variable for the row to go into
while ($result = mysqli_fetch_assoc($rs)) # Fetch each result one at a time
{
    if ($result['administrators'] == 1) # Check the role
    {
        $showUser = true; # Set the show to true if it equals 1
        $row = $result; # Set the row to equal the result given
    }
    break; # You only need the first result
}
if ($showUser)
{
    /* Do your work with $row! */
}
?>

我也删除了email AS email只是email ，因为它会已经有此名称，以便它是不需要的烂摊子。

我还建议在您的查询中添加WHERE子句以减少（过滤）结果

如果您使用的是数据库中的图像，则可以执行以下操作：

<img src="<?=$row['image_column_name'];?>" height="120" width="120" />

这应该显示您想要的图像:)

示例代码来源

像原始答案一样的完整示例：

<?php

$mysqliClass = mysqli_init();
$mysqliClass->real_connect("hostname or IP", "dbUsername", "dbPassword", "databasename");

$query = "SELECT `name`, `logo` AS describe , IF(`status` = 0, 'Online', 'Offline') as be_on FROM `domain`";
$rs = $mysqliClass->query($query);

$rows = []; # This will have more than one in it this time!
while ($result = mysqli_fetch_assoc($rs))
{
    $rows[] = $result;
}

foreach ($rows as $r)
{
    foreach ($r as $rowKey => $rowValue) # Double loop because you have an array in an array this way
    {
        if ($rowKey == "describe")
        {
            print '<img src="' . $rowValue . '" height="120" width="120" />';
        }
    }
}

?>