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Configuration example of php using pdo to connect to sqlite3, pdosqlite3_PHP tutorial
- WBOYOriginal
- 2016-07-12 08:50:501127browse
Configuration example of php using pdo to connect to sqlite3, pdosqlite3
This article describes the configuration method of php using pdo to connect to sqlite3. Share it with everyone for your reference, the details are as follows:
When I first started using php sqlite, I always thought that I was using sqlite3. In fact, it was not the case. PHP only started to support sqlite3 by default from php5 >=5.3.0
Please refer to the official document http://www.php.net/manual/zh/sqlite3.open.php
Default method interface:
public void SQLite3::open ( string $filename [, int $flags = SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE [, string $encryption_key ]] )
When using PHP to operate the database, I found that PHP only supports Sqlite2 by default and does not support the latest version of Sqlite3. If you want to support Sqlite3, you must use PDO. To use PDO, you need to load the two modules php_pdo.dll and php_pdo_sqlite.dll in php.ini. As follows:
extension=php_pdo.dll extension=php_pdo_sqlite.dll
If pdo is not used, even if you turn on the above parameters, you are still using sqlite2. If you don’t believe me, you can visit the generated database and see if there is a prompt at the beginning of the file:
** This file contains an SQLite 2.1 database **
When the php environment does not enable the above supported configuration, the following error will be reported:
Fatal error: Call to undefined function sqlite_open()
sqlite3 example:
<html>
<?php
//$dsn = 'sqlite:sql.db';
try
{
//$dbh = new PDO($dsn, $user, $password); //建立连接
// $dbh = new PDO('sqlite:yourdatabase.db');
$dbh = new PDO('sqlite:itlife365.com');
echo 'Create Db ok' ;
//建表
$dbh->exec("CREATE TABLE itlife365(id integer,name varchar(255))");
echo 'Create Table itlife365 ok<BR>';
$dbh->exec("INSERT INTO itlife365 values(1,'itlife365.com')");
echo 'Insert Data ok<BR>';
$dbh->beginTransaction();
$sth = $dbh->prepare('SELECT * FROM itlife365');
$sth->execute();
//获取结果
$result = $sth->fetchAll();
print_r($result);
$dsn=null;
}
catch (PDOException $e)
{
echo 'Connection failed: ' . $e->getMessage();
$dsn = null;
}
?>
</html>
<?php $dbh = null;//或使用unset($dbh); ?>
Verification: View database:
Displayed in the file header:
SQLite format 3***
For more instructions, please refer to the official website: http://cn.php.net/manual/zh/ref.pdo-sqlite.php
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I hope this article will be helpful to everyone in PHP programming.