php - MySQL 相关排序

Question

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Answer 1

您将不得不更改您的脚本。

1. 查询，顺序后when不正确
2. 你必须打印出你想要的 url，重定向是可能的，但它只会将你重定向到第一行(或第一个结果)
3. 您的数据中有一个 badshort 评级，这将导致 null，因为您没有让“badshort”成为一个值的规则。

没有 post 的完整测试脚本将变为:

<?php
$lname = 'something';
$address = 'something1';
$street = 'something2';
$city = 'something3';
$county = 'something4';

try{
$stmt = $conn->prepare("SELECT *, case 
WHEN rating like 'badabusive' THEN 0 
WHEN rating like 'badnopay' THEN 1 
WHEN rating like 'cautionlate' THEN 2 
WHEN rating like 'cautiondiscount' THEN 3 
WHEN rating like 'cautionextra' THEN 4 
WHEN rating like 'good' THEN 5 
END as ratingval FROM clients 
WHERE  
lname  like :lname and
address  like :address and
street  like :street and
city  like :city and
county  like :county
order by ratingval");

$stmt->bindParam(':lname', $lname);
$stmt->bindParam(':address', $address);
$stmt->bindParam(':street', $street);
$stmt->bindParam(':city', $city);
$stmt->bindParam(':county', $county);

$stmt->execute();

$userRow = $stmt->fetchAll();
if(!$userRow){
print "nothing found";
}
else
{
foreach ($userRow as $result) {
echo $result[lname] . " " . $result[ratingval]. "<br>";
}
}
}
catch(PDOException $e){
echo $e->getMessage();
}
?>