PHP

how to connect database in php

<?php
 $hostName = "localhost";
 $userName = "root";
 $password = "";
 $dbName = "database name";
 $conn= new mysqli($hostName,$userName,$password,$dbName);
 if($conn){
    echo "connected";
 }else{
    echo "not connected";
 }

  ?>

how to connect to a database in php

<?php
$servername = "localhost";
$username = "username";
$password = "password";

// Create connection
$conn = new mysqli($servername, $username, $password);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>

how to connect sql database inside php

<?php
    $dbServername = "localhost";
    $dbUsername = "root";
    $dbPassword = "";
    $dbName = "dbname";
    
    $conn = mysqli_connect($dbServername, $dbUsername, $dbPassword, $dbName);
	
    $sql = "SELECT * FROM dbname;";
    $result = mysqli_query($conn, $sql);
    $resultCheck = mysqli_num_rows($result);

    if ($resultCheck > 0) {
      while ($row = mysqli_fetch_assoc($result)) {
        echo $row['sql_row_name'] . "<br>";
      }
    }
?>

connect sql server php

//Connect MSSQL
$serverName = '192.xxx.xxx.xx';
$userName = 'usertest';
$userPassword = 'pwdtest';
$dbName = 'dbtest';
 
try{
	$conn = new PDO("sqlsrv:server=$serverName ; Database = $dbName", $userName, $userPassword);
	$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(Exception $e){
	die(print_r($e->getMessage()));
}
 
//การ query และแสดงข้อมูล จัดเรียงตามฟิวด์ field1 แบบมากไปน้อย เริ่มที่เรคคอร์ดที่ 0-100
$query = " SELECT * FROM tbl 
ORDER BY field1 DESC
OFFSET 0 ROWS
FETCH NEXT 100 ROWS ONLY ";
$getRes = $conn->prepare($query);
$getRes->execute();
 
while($row = $getRes->fetch( PDO::FETCH_ASSOC ))
{
echo $row['field1']."<br />";
echo $row['field2']."<br />";
}

connect php in sql server

SQL SERVER 2012 conexion in PHP
<?php
    $serverName = "SERVER"; //serverNameinstanceName
    $connectionInfo = array( "Database"=>"base", "UID"=>"ex", "PWD"=>"******");
    $conn = sqlsrv_connect( $serverName, $connectionInfo);
;

        if( $conn ) {
             echo "Conexión establecida.<br />";
        }else{
            echo "Conexión no se pudo establecer.<br />";
            die( print_r( sqlsrv_errors(), true));
        }

    $sql = "SELECT name FROM [base].[dbo].[table]";
    $params = array();
    $options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
    $stmt = sqlsrv_query( $conn, $sql , $params, $options );

    $row_count = sqlsrv_num_rows( $stmt );
  

        if ($row_count === false)
           echo "Error al obtener datos.";
        else
           echo "bien";
        //echo $row_count;

        while( $row = sqlsrv_fetch_array( $stmt) ) {
              print json_encode($row);
        }

    sqlsrv_close($conn);
?>

connect php to db

This is an update to a note I wrote earlier concerning how to set multiple attributes when you create you PDO connection string.

You can put all the attributes you want in an associative array and pass that array as the fourth parameter in your connection string. So it goes like this:
<?php
$options = [
    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_CASE => PDO::CASE_NATURAL,
    PDO::ATTR_ORACLE_NULLS => PDO::NULL_EMPTY_STRING
];

// Now you create your connection string
try {
    // Then pass the options as the last parameter in the connection string
    $connection = new PDO("mysql:host=$host; dbname=$dbname", $user, $password, $options);

    // That's how you can set multiple attributes
} catch(PDOException $e) {
    die("Database connection failed: " . $e->getMessage());
}
?>