pdo

问题 Where do you put the connection settings for a database connection (things like host, dbname, user, password)? Is it placed in the database class or file, or outside in a config file, or somewhere else? 回答1: Ideally, you should place it in a config file, which can be something as simple as a PHP array. For example: db_config.php $db_config = array( 'host' => 'localhost', 'user' => 'username', 'password' => 'qwerty' ); You should then place this file outside your document root for maximum

问题 I couldn't understand the exact working of the fetch/fetchall in PDO.can i get a simple example for PDO fetch for fetching each row and displays its values iteratively? 回答1: There are a lot of examples around.. You can do a simple fetch using a while loop too <?php //your PDO connection goes here..... $stmt = $db->query('SELECT username FROM yourtable'); while($row = $stmt->fetch(PDO::FETCH_ASSOC)) { echo $row['username']; } Read the PHP Manual on PDOStatement::fetch By using a fetchAll , you

问题 I couldn't understand the exact working of the fetch/fetchall in PDO.can i get a simple example for PDO fetch for fetching each row and displays its values iteratively? 回答1: There are a lot of examples around.. You can do a simple fetch using a while loop too <?php //your PDO connection goes here..... $stmt = $db->query('SELECT username FROM yourtable'); while($row = $stmt->fetch(PDO::FETCH_ASSOC)) { echo $row['username']; } Read the PHP Manual on PDOStatement::fetch By using a fetchAll , you

问题 I am converting all my queries from mysql to PDO, and in this process I found a conditional query like a follows if (isset($parameters['searchTerm'])) { $where =" And title LIKE '%{$parameters['searchTerm'] }%'"; } $sql = "Select * from table data Where tableId = 5 {$where} "; and when I am trying to convert this query in PDO the expected syntax is as follows if (isset($parameters['searchTerm'])) { $where =" And title LIKE :searchTerm"; } $sql = $dbh->prepare("Select * from table data Where

问题 I'm trying to select some data from a mysql table but I cannot get the Where comparison to be case insensitive, I tried using LOWER: $wildcard = $_GET['q']; $query = "SELECT id, name, departamento FROM gestionDoc_cargos WHERE (LOWER(name) LIKE '%' LOWER(:wildcard) '%' OR LOWER(departamento) LIKE '%' LOWER(:wildcard) '%')"; try{ $result = DB::getInstance()->prepare($query); $result->bindParam(':wildcard', $wildcard, PDO::PARAM_STR); $result->execute(); $result = $result->fetchAll(PDO::FETCH

问题 I have the following problem. This error persisting in accompanying me Fatal error: Uncaught Error: Call to a member function fetchAll() on boolean in C:\xampp\htdocs\certificado\functions.php:49 Stack trace: #0 C:\xampp\htdocs\certificado\index.php(11): get_info_from_email('amanda_pandoka@...') #1 {main} thrown in C:\xampp\htdocs\certificado\functions.php on line 49 In the code below I can not understand the error. Can someone help me? function connect() { $socket = new PDO('mysql:host=' . @

问题 So I have a trouble here. Tried use mssql_connect() but interpeter says that function is undefinied. PHP.net advices this, but it suppports only older versions of PHP. Is it possible to connect to MS SQL Server database from PHP5.6? What extensions should I add, what functions can I use? Configuration details: localhost, Apache 2.4, PHP 5.6, OS Windows 8. 回答1: You need to enable the MSSQL extension in the PHP.ini file. If this extension is not installed, you need to install it in PHP. Please

问题 So I have a trouble here. Tried use mssql_connect() but interpeter says that function is undefinied. PHP.net advices this, but it suppports only older versions of PHP. Is it possible to connect to MS SQL Server database from PHP5.6? What extensions should I add, what functions can I use? Configuration details: localhost, Apache 2.4, PHP 5.6, OS Windows 8. 回答1: You need to enable the MSSQL extension in the PHP.ini file. If this extension is not installed, you need to install it in PHP. Please

问题 I use PDO transaction try { DB::$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); DB::$db->beginTransaction(); $db->prepare( insert query ); $db->execute(); $last_insert_id = $db->lastInsertId(); ... ... Multiple concurrent requests are expected on this script. Question: is it possible that lastInsertId() return incorrect value for the user, who actually inserted the row? (by "incorrect value" i mean: id that is inserted by some other user). 回答1: You're safe. The ID you get will

问题 I use PDO transaction try { DB::$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); DB::$db->beginTransaction(); $db->prepare( insert query ); $db->execute(); $last_insert_id = $db->lastInsertId(); ... ... Multiple concurrent requests are expected on this script. Question: is it possible that lastInsertId() return incorrect value for the user, who actually inserted the row? (by "incorrect value" i mean: id that is inserted by some other user). 回答1: You're safe. The ID you get will