How to display data from SQL Server - php

Question

I can get the connection but the data does not show. Some error occurs at this line:
if($result ->num_rows > 0)
The table names for this database is "ndtatt".
This table has 4 columns. And that just one example the value stored in this database.
varchar CARDNO = value 009145
varchar STAFF = value V0822
varchar NAME = value Marry
Varchar ATTDATE = value 2020/01/04
.
<?php
$serverName = "LAPTOP-61BF65AR";
$connectionInfo = array("Database"=>"LocalDatabase");
$conn = sqlsrv_connect ($serverName, $connectionInfo);
if ($conn) {
echo " Connection established.<br/>";
}else{
echo "Connection Failed.<br />";
die(print_r (sqlsrv_errors() , true));
}
$attDate = $_GET['attDate'];
$cardNo = $_GET['cardNo'];
$sql = "SELECT * FROM ndtatt WHERE ATTDATE = '$attDate' AND CARDNO = '$cardNo'";
$result = sqlsrv_query ($conn, $sql);
if($result ->num_rows> 0)
{while($row = $result->fetch_assoc())
{?>
<tr>
<td><?php echo $row['CARDNO']; ?></td>
<td><?php echo $row['STAFF']; ?></td>
<td><?php echo $row['NAME']; ?></td>
<td><?php echo $row['ATTDATE']; ?></td>
</tr>
<?php
}}
else {echo "0 results";}
$conn->close();
?>
Below this is the html file :
<form method="GET" action="get3.php">
<h3 class="absolute" > Attendance Date :
<input type="date" name="attDate"> </h3>
</br></br></br>
<h3 class="absolute2" > Card Number :
<input type="text" name="cardNo" placeholder="Card Number"> </h3>
</br></br></br></br></br>
<center> <input type="submit" name="search" value="Search" class="button" /> </center>
</form>
The first source codes was originally for php(xampp) database with html, but I have made some changes in it, because I want to change the database(php) into sql server.
Do I need to change the entire source codes or just make some changes like I have done in the source codes given?
Does XAMPP have anything to do with SQL Server? I mean, to use the SQL server, do I need to open XAMPP when to run the codes?

Answer 1

XAMPP is an Apache distribution containing MariaDB, PHP and Perl, so the only thing that you need to connect to SQL Server, is to install the PHP Driver for SQL Server (you are using sqlsrv_ functions in your code).
But you have some issues with your code:
You need to use only sqlsrv_ functions. The calls to $result->num_rows, $result->fetch_assoc() and $conn->close() will raise an error.
You need to use "ReturnDatesAsStrings" => true as a connection option to fetch the date/time values as strings (the default value is false and the values of date/time columns are returnded as PHP DateTime objects).
The date values in your table are stored as text, so you need to transform the value of the input elements of type "date" to match the format in the table (yyyy-mm-dd). As a side note, if possible, do not store date values as text. Use the appropriate data types - date or datetime2 in this case.
Always try to use parameters in your statements to prevent SQL injection issues. As is mentioned in the documentation, the sqlsrv_query() function does both statement preparation and statement execution, and can be used to execute parameterized queries.
Example, based on the code in the question:
<?php
// Connection
$serverName = "LAPTOP-61BF65AR";
$connectionInfo = array(
"ReturnDatesAsStrings" => true,
"Database" => "LocalDatabase"
);
$conn = sqlsrv_connect($serverName, $connectionInfo);
if ($conn) {
echo " Connection established.<br/>";
} else {
echo "Connection Failed.<br />";
echo "Error (sqlsrv_connect): ".print_r(sqlsrv_errors(), true);
exit;
}
// Query
$attDate = DateTime::createFromFormat('Y-m-d', $_GET['attDate'])->format('Y/m/d');
$cardNo = $_GET['cardNo'];
$sql = "SELECT * FROM ndtatt WHERE ATTDATE = ? AND CARDNO = ?";
$params = array($attDate, $cardNo);
$result = sqlsrv_query ($conn, $sql, $params);
if ($result === false ) {
echo "Error (sqlsrv_query): ".print_r(sqlsrv_errors(), true);
exit;
}
// Fetch data
if (sqlsrv_has_rows($result)) {
while ($row = sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC)) {
?>
<tr>
<td><?php echo $row['CARDNO']; ?></td>
<td><?php echo $row['STAFF']; ?></td>
<td><?php echo $row['NAME']; ?></td>
<td><?php echo $row['ATTDATE']; ?></td>
</tr>
<?php
}
} else {
echo "0 results";
}
// End
sqlsrv_free_stmt($result);
sqlsrv_close($conn);
?>
Notes:
The code from the question is driver specific, but you may try to rewrite this code using PDO (PHP Data Objects). With PDO, using the new code, you can use any supported database (of course you need to install a database-dependant driver that implements the PDO interface).

Answer 2

The query below will retrieve two table data with join:
SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate
FROM Orders
INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;