PHP and MYSQL JSON API Query

我一直在寻找答案，尝试了很多方法，但无论我怎么说，似乎都无法弄清楚。我错过了一些东西。。哈哈。

我有一个从mysql获取数据的php文件。

$query = "SELECT * FROM `UnitMaintbl` WHERE `Unit` LIKE '%{$value}%' ORDER BY Recnum DESC";

这很好，但是我有一个字段是另一个表的索引，我需要另一个表格的描述。所以我需要INNER加入两个表。好的，没问题。

$query = "SELECT * FROM `UnitMaintbl` 
INNER JOIN `Statustbl` ON UnitMaintbl.StatusID=Statustbl.StatusDesc
ORDER BY Recnum DESC";

首先，我想让JOIN基于任何单元进行测试。然后我想从表格中取回我的$Value。所以…

$query = "SELECT * FROM `UnitMaintbl` 
INNER JOIN `Statustbl` ON UnitMaintbl.StatusID=Statustbl.StatusDesc
WHERE Unitmaintbl.Unit = '%{$value}%'"
ORDER BY Recnum DESC";

我尝试了几种不同的帮助方案，但似乎无法实现。

非常感谢您的帮助。。。。提前谢谢。。

编辑

<?php

$host = "localhost"; //Your database host server
$db = "PicorpBE"; //Your database name
$user = "username"; //Your database user
$pass = "password"; //Your password
$value=$_GET['Unit']; // Unit Number
$connection = mysql_connect($host, $user, $pass);
//Check to see if we can connect to the server
if(!$connection)
{
    die("Database server connection failed.");  
}
else
{
    //Attempt to select the database
    $dbconnect = mysql_select_db($db, $connection);
    //Check to see if we could select the database
    if(!$dbconnect)
    {
        die("Unable to connect to the specified database!");
    }
    else
    {
    $query = "SELECT * FROM `UnitMaintbl` 
    INNER JOIN `Statustbl` ON UnitMaintbl.StatusID=Statustbl.StatusDesc
WHERE Unitmaintbl.Unit = '%{$value}%'
ORDER BY Recnum DESC";
$resultset = mysql_query($query, $connection);
        $records = array();
        //Loop through all our records and add them to our array
        while($r = mysql_fetch_assoc($resultset))
        {
            $records[] = $r;        
        }
        //Output the data as JSON
        echo json_encode($records);
    }

}
?>

我重做了php，但没有得到：

[23-Dec-2015 14:26:52]PHP警告：mysqli_query（）[function.mysqli query]：第25行/home/picorp05/public_html/json.PHP中的空查询[23-Dec-2015 14:26:52]PHP警告：mysqli_close（）期望参数1为mysqli，在第45行/home/picorp05/public_html/json.PHP中给定布尔值

<?php
// Variables From Search
$sunit=$_GET['Unit']; // Unit Number
// Create connection
$con=mysqli_connect("localhost","username","password","dbname");
// Check connection
if (mysqli_connect_errno())
{
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// This SQL statement should select Unit ($sunit) from the table     'UnitMainTbl and
// Join related table. '
$query = "SELECT * FROM `UnitMaintbl` 
         INNER JOIN `Statustbl` ON UnitMaintbl.StatusID=Statustbl.StatusDesc
         WHERE Unitmaintbl.Unit = '%{$sunit}%'
         ORDER BY Recnum DESC";
// Check if there are results
if ($result = mysqli_query($con, $sql))
{
// If so, then create a results array and a temporary one
// to hold the data
$resultArray = array();
$tempArray = array();
// Loop through each row in the result set
while($row = $result->fetch_object())
{
    // Add each row into our results array
    $tempArray = $row;
    array_push($resultArray, $tempArray);
}
// Finally, encode the array to JSON and output the results
echo json_encode($resultArray);
}
// Close connections
mysqli_close($result);
mysqli_close($con);
?>

好的，最后的代码，它可以和我的前几个测试一起工作，哈哈。。呜呜。。谢谢大家的帮助。

<?php
// Variables From Search
$sunit=$_GET['Unit']; // Unit Number
//open connection to mysql db
$connection = mysqli_connect("localhost","user","pass","PicorpBE") or     die("Error " . mysqli_error($connection));
//fetch table rows from mysql db
$sql = "SELECT * FROM `UnitMaintbl` 
    INNER JOIN `Statustbl` ON UnitMaintbl.StatusID=Statustbl.StatusDesc
    WHERE UnitMaintbl.Unit LIKE '%{$sunit}%'
    ORDER BY Recnum DESC";
$result = mysqli_query($connection, $sql) or die("Error in Selecting " . mysqli_error($connection));
//create an array
$emparray = array();
while($row =mysqli_fetch_assoc($result))
{
    $emparray[] = $row;
}
echo json_encode($emparray);
//close the db connection
mysqli_close($connection);
?>