fetchall

Does the PHP program write a lot of comments? I write PHP code has a lot of comments, will there be anything to PHP performance has a bad impact ah? Comments are much more, there is more time than the code itself. Are there any drawbacks? Such as:

Let's look at the calling method first. $xml = new Mysql2xml (Array (' host ' => ' localhost ', ' username ' => ' root ', ' password ' => ', ' database ' => ' MySQL ') );$xml->settables (Array (' wp_term_relationships ', ' wp_terms '))//Set up

mysql2xml.php class file: For backup mysql data!! The code is as follows Copy Code Class Mysql2xml {protected $conn;protected $result;protected $tables;protected $saveFolder = ' datas/';Public function __construct

The code is as follows:$DSN = "Mysql:host=localhost;dbname=group";$db = new PDO ($dsn, ' root ', ');$db->exec (' Set names UTF8 '); $sql = "Select conf_id from ' Group by conf_id";$pre = $db->prepare ($sql);$result _arr = Array ();$pre = $db->query

This article describes the Zend Framework to achieve the basic functions of the message book. Share to everyone for your reference, specific as follows: A message book ... The basic function is. 1. Leave a message. 2. Reply to the message. 3.

This article is an example of how to implement XML and MySQL data conversion in PHP. Share to everyone for your reference. The specific analysis is as follows: This provides a mysql2xml conversion class that can quickly convert XML to MySQL while

First, create MySQL, authorizeRights ManagementWe know that our top authority manager is the root user, and it has the highest permissions. Includes select, Update, delete, update, Grant, and so on. So in general, after the company, the DBA engineer

Python queries MySQL uses the Fetchone () method to get a single piece of data, using the Fetchall () method to get multiple data. Fetchone (): This method gets the next query result set. The result set is an object Fetchall ():

Introductory tutorials for PDO in PHP5If you already know PDO, you can look directly at the following thinkphp 3.1 How to use PDO query MySQL to avoid SQL injection risk.PDO (PHP Data Object) is a new PHP 5 things, in PHP 5.5, is strongly

PDO How to connectNew PDO ("mysql:host=localhost;dbname=php100", "root", ""); The default is not a long connection, if you need a long database connection, you need to add a parameter last:Array (pdo::attr_persistent = True) becomes this:new PDO (

The previous article has been described without database version operation (Csv,json), today we will start to talk about the database version of the operation, the first is sqlite3.1 IntroductionSQLite is a C library that provides a lightweight disk-

(Create connection and cursor code omitted here) SQL1="SELECT * FROM table name" #SQL statement 1Cursor1.execute (SQL1)#Execute SQL statement 1Read1=list (Cursor1.fetchall ())#reading Results 1Sql2="SHOW full COLUMNS from table name"

Querying DataWhen you execute a query SQL statement using the Execute () function, you get only the number of rows affected, and you don't really get what we're querying. It doesn't matter, there are three ways to extract data in cursor cursors:

1. Connect to the database1) Connect directly to the database and create a cursor (the cursor)cnxn = pyodbc.connect(‘DRIVER={SQL Server};SERVER=localhost;DATABASE=testdb;UID=me;PWD=pass‘)cursor = cnxn.cursor()2) Connect using DSN. The DSN connection

PHP PDO notation connection mysql;Writing one:$db = "Mysql:host=localhost;dbname=sql"; //connection data, address localhost; database name SQL;$username = "root"; Database login account;$password = "root"; Database login password;try{$pdo =new PDO ($

PHPTry{ $DBH=NewPDO (' Mysql:dbname=testdb;host=localhost ', ' mysql_user ', ' mysql_pwd '); }Catch(pdoexception$e) {Echo' Database connection failed: '.$e-GetMessage (); Exit; } Echo' '; Echo' Contact information table '; Echo' ';

PDO is a database access abstraction layer used to unify access interfaces of various databases. Compared with mysql and mysqli function libraries, PDO makes cross-database use more friendly; compared with ADODB and MDB2, PDO is more efficient. At

This article mainly introduces the implementation code sharing of the database Singleton mode in PHP. This article first explains some knowledge about Singleton mode and then provides the implementation code of the database Singleton mode, for more

PDO is a public class for mysql database operations. We can directly use pdo to operate databases without having to customize the class, but in the default php configuration, pdo is not enabled, so we must first in php. enable it in ini. You need to

Today, let's talk about how to use some query statements in zend_db_table_abstract. If you need them, please refer to them. The Code is as follows: Copy code ---- Table structure 'charge _ logs'-- Create table if not exists