pdo | 易学教程

Linux安装pdo_mysql模块

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网站不能访问查看apache日志 PHP Fatal error: Uncaught exception 'PDOException' with message 'could not find driver' (PHP 5.3.29) 网站php代码是用pdo模块去访问mysql数据库 #查看php中pdo是否支持mysql php -m | grep -i pdo_mysql #何为pdo POD（PHP Data Object）扩展在PHP5中加入，PHP6中将默认识用PDO连接数据库，所有非PDO扩展将会在PHP6被从扩展中移除。该扩展提供PHP内置类 PDO来对数据库进行访问，不同数据库使用相同的方法名，解决数据库连接不统一的问题。 #下载pdo_mysql源码 wget http://pecl.php.net/get/PDO_MYSQL-1.0.2.tgz tar -zxv -f PDO_MYSQL-1.0.2 cd PDO_MYSQL-1.0.2 /usr/local/bin/phpize #必须安装有 m4 autoconf ./configure --with-php-config=/usr/local/bin/php-config --with-pdo-mysql=/usr/local/mysql make && make install #pdo_mysql

Can I bind a parameter to a PDO statement as a comparison operator?

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问题 Is this code class opinion { private $dbh; var $opinionid,$opinion,$note,$actorid,$dateposted; var $isnew=FALSE; function loadby($column,$value,$operator="="){ $dbh = new PDO(I deleted parameters here); $statement=$dbh->prepare("select * from fe_opinion where :column :operator :value"); $statement->bindParam(":column", $column); $statement->bindParam(":value", $value); $statement->bindParam(":operator", $operator); //UNSURE, DOUBTFUL $statement->bindColumn("opinionid", $this->opinionid);

面向过程式的数据库连接

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3 月，跳不动了？>>> 1、mysql系列函数 --连接mysql的老函数，性能不佳，已经被mysqli替代 2、mysqli系列函数 --mysql系列的增强版，如果直接连接mysql数据库，性能最好 3、pdo抽象层 --抽象的数据库连接方法，它实现了一套代码，适配各种数据库（早就说过，除了mysql数据库以外，还有很多使用sql语句来操作的数据库，比如sql server、oracle数据库）以上三种，如果你的框架只支持mysql数据库的话，用mysqli性能最佳，如果适应所有的sql数据库，用pdo 这里我们演示一下pdo的连接 $host='localhost'; //数据库主机名 $dbName='mengli'; //使用的数据库 $dsn="mysql:host=$host;dbname=$dbName"; //第一个参数，拼接一个dsn，dsn是一串包括了你想要连接的ip地址，以及数据库名字。因为是本地环境，所以ip填localhost或者127.0.0.1都行，如果是远程数据库，比如你实际工作的数据库，就是一串ip地址了。 $pdo = new pdo($dsn, 'root', 'root'); $sql = "SELECT * FROM user"; $sth = $pdo->prepare($sql); $sth->execute(); $result

PHP之PDO学习

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安装配置网上搜了。PHP5.1.4以后都带了这个扩展在php.ini 把“；”号去掉就行 1、连接数据库代码 try { $dbh = new PDO( ' mysql:host=localhost;dbname=test ' , ' root ' , ' 123 ' ); // 原始化一个PDO对象，就是建立了数据库连接对象$dbh echo " 连接成功<br/> " ; $dbh = null ; } catch (PDOException $e ){ die ( " Error!: " . $e -> getMessage() . " <br/> " ); } 2、获取数据 $rs = $db -> query( " SELECT * FROM foo " ); while ( $row = $rs -> fetch()){ print_r ( $row ); } 3、很方便的放到数组里面 fetchAll <? php $rs = $db -> query( " SELECT * FROM foo " ); $result_arr = $rs -> fetchAll(); print_r ( $result_arr ); ?> 4、数字关联索引浪费 setAttribute （字段大小写） setFetchMode （数组模式）代码 <? php $db ->

PDO bindParam() PHP Foreach Loop

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问题 I have a foreach loop that I would like to execute a prepare statement pdo. I have read a few posts on making a reference but I do not know how to do it with my code: $str = ":City, Aurora; :State, CO"; $wherestr = explode(";",$str); $sql = "SELECT * FROM Organization WHERE City = :City AND State= :State"; $stmt = $db->prepare($sql); foreach ($wherestr as $ws) { $ws = explode(",",$ws); $ws0 = trim($ws[0]); $ws1 = trim($ws[1]); $stmt->bindParam($ws0,$ws1); } $stmt->execute(); I have read here

Non-Emulated Prepared Statement support from MS SQL Server through PHP on Linux

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问题 Summary I'm attempting to use prepared statements to stop SQL Injections, but am unable to find the support I need to guarantee it is working properly. Scenario I am hosting a site on Linux which is connecting to a Microsoft SQL Server with FreeTDS version 0.91, specifically using FreeTDS's dblib . I have set the tds version to 7.4 for the database connection, and am using PHP's PDO object. According to the FreeTDS documentation, 4.2 does not support prepared statements: TDS 4.2 has

Multidimensional array values not inserted through PDO loop

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问题 I have a dynamic HTML form with three fields (item, number, cost). Users can add as many rows as they need. Because of this, I have set the fields names as item[], number[], cost[] in order to loop through the post and insert the values in the DB. I have verified that the values are posted correctly up correctly through vardump, and I have checked that the following loop is picking up the values (both key and value) through printr. (and also simply echoing $value1). foreach ($_POST as $field

Can php PDO fetch two results sets? And If yes, what is better 1 result set or more than 1?

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问题 If is posible, how can I fetch two results sets: $sth=$dbh->prepare("SELECT * FROM tb1 WHERE cond1; SELECT * from tb2 Where cond2"); $sth->execute(); $row=$sth->fetchAll(); print_r ($row); These are two completely different tables (no fiels in common). 回答1: Yes PDO can fetch two (or more) rowsets, as long as the database you are using supports it. I think MS SQL Server and MySQL both support this functionality, but at the time of writing SQLite does not. The function you want is PDOStatement:

pdo的三个预定义类，PDO PDOStatement PDOException

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PDO 简介——PDO中的三个类及其方法标签：数据库 sql user mysql php query 2008-09-28 18:51 1215人阅读评论 (0) 举报分类： PHP（10）转载自： http://www.fanbin.name/2007/12/20/pdo-%e7%ae%80%e4%bb%8b-pdo%e4%b8%ad%e7%9a%84%e4%b8%89%e4%b8%aa%e7%b1%bb%e5%8f%8a%e5%85%b6%e6%96%b9%e6%b3%95/ PDO中包含三个预定义的类，它们分别是 PDO 、 PDOStatement 和 PDOException ，下面将分别简单介绍一下。后面的系列相关文章会使用若干示例介绍这几个类的使用。一、PDO 代表一个PHP和数据库之间的连接。方法： PDO - 构造器，构建一个新的PDO对象 beginTransaction - 开始事务 commit - 提交事务 errorCode - 从数据库返回一个错误代号，如果有的话 errorInfo - 从数据库返回一个含有错误信息的数组，如果有的话 exec - 执行一条SQL语句并返回影响的行数 getAttribute - 返回一个数据库连接属性 lastInsertId - 返回最新插入到数据库的行（的ID） prepare -

How to delete data from sql with pdo?

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问题 Hello I have search the web all day trying to find example of deleting data when I use pdo but all i found its MySQL and MySQLi and I am stuck i can't see what I am missing when I run it it give me /search.php?del=Array(id). This its my code please help <?php //load database connection $host = "localhost"; $user = "abcd"; $password = "******"; $database_name = "abcd"; $pdo = new PDO("mysql:host=$host;dbname=$database_name", $user, $password, array( PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION

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