Maison >développement back-end >tutoriel php >PDO的使用_PHP教程
//首先要连接mysql数据库 //执行个查询 //另外还可以: //将整个记录集读到数组里: [1] => Array ) //插入 / 删 / 更新数据: //偶忘了偶用啥数据库了。。。。 //原来插入数据的时候要用mysql_escape_string,现在? //最后偶要关闭它了 //很简单的不是? 附:特别简单的特殊调用方法: 也可以: 这么好的功能,哪里可以找到?php5.1以上在扩展里,php5在pecl里,php4?你别想了,没有。
$dbh = new PDO(mysql:host=localhost;dbname=test, $user, $pass);
//如果你想连mssql:
//mssql:host=localhost;dbname=testdb
//连pgsql:
//pgsql:host=localhost port=5432 dbname=testdb user=bruce password=mypass
//连odbc(DSN)
//odbc:testdb
//连access:
//odbc:Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\db.mdb;Uid=Admin
//还有oracle,sqlite,db2....
foreach ($dbh->query(SELECT * from FOO) as $row) {
print_r($row); //这个结果和mysql_fetch_array差不多。PDOStatement::setFetchMode 可以调整。
}
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();
$result = $sth->fetchAll();
print_r($result);
//输出:
Array
(
[0] => Array
(
[NAME] => pear
[0] => pear
[COLOUR] => green
[1] => green
)
(
[NAME] => watermelon
[0] => watermelon
[COLOUR] => pink
[1] => pink
)
$count = $dbh->exec("DELETE FROM fruit WHERE colour = red");
//$count就是删除的条数。相当于mysql_affected_rows
//也可用PDOStatement::rowCount
if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == mysql) {
echo "Running on mysql; doing something mysql specific here
";
}
print "Unquoted string: $string
";
print "Quoted string: " . $conn->quote($string) . "
";
//得到:
Unquoted string: Nice
Quoted string: Nice
//你看现在连引号都自动加了。。。。
//注意在不同的数据库中结果不同,比如有的 => ,有的 => ,\ => \
//现在没顾虑了,全自动。
$conn = null;
//但是!你可以保持连接:
$dbh = new PDO(odbc:SAMPLE, db2inst1, ibmdb2,
array(PDO_ATTR_PERSISTENT => true));
$stmt = $dbh->prepare("SELECT * FROM REGISTRY where name = ?");
if ($stmt->execute(array($_GET[name]))) { //你怕啥?自动quote!
while ($row = $stmt->fetch()) {
print_r($row);
}
}
$stmt->bindParam(1, $id);
$stmt->bindParam(2, $_FILES[file][type]);
$stmt->bindParam(3, $fp, PDO::PARAM_LOB);