PDOStatement 类

    (PHP 5 >= 5.1.0, PHP 7, PHP 8, PECL pdo >= 1.0.0)

    简介

    代表一条预处理语句，并在该语句被执行后代表一个相关的结果集。

    类摘要

    class PDOStatement {
    /* 属性 */
    public string $queryString;
    /* 方法 */
    public bindColumn(
        string|int $column,
        mixed &$var,
        int $type = PDO::PARAM_STR,
        int $maxLength = 0,
        mixed $driverOptions = null
    ): bool
    public bindParam(
        string|int $param,
        mixed &$var,
        int $type = PDO::PARAM_STR,
        int $maxLength = 0,
        mixed $driverOptions = null
    ): bool
    public bindValue(string|int $param, mixed $value, int $type = PDO::PARAM_STR): bool
    public closeCursor(): bool
    public columnCount(): int
    public debugDumpParams(): ?bool
    public errorCode(): ?string
    public errorInfo(): array
    public execute(?array $params = null): bool
    public fetch(int $mode = PDO::FETCH_DEFAULT, int $cursorOrientation = PDO::FETCH_ORI_NEXT, int $cursorOffset = 0): mixed
    public fetchAll(int $mode = PDO::FETCH_DEFAULT): array
    public fetchAll(int $mode = PDO::FETCH_COLUMN, int $column): array
    public fetchAll(int $mode = PDO::FETCH_CLASS, string $class, ?array $constructorArgs): array
    public fetchAll(int $mode = PDO::FETCH_FUNC, callable $callback): array
    public fetchColumn(int $column = 0): mixed
    public fetchObject(?string $class = "stdClass", array $constructorArgs = []): object|false
    public getAttribute(int $name): mixed
    public getColumnMeta(int $column): array|false
    public getIterator(): Iterator
    public nextRowset(): bool
    public rowCount(): int
    public setAttribute(int $attribute, mixed $value): bool
    public setFetchMode(int $mode): bool
    public setFetchMode(int $mode = PDO::FETCH_COLUMN, int $colno): bool
    public setFetchMode(int $mode = PDO::FETCH_CLASS, string $class, ?array $constructorArgs = null): bool
    public setFetchMode(int $mode = PDO::FETCH_INTO, object $object): bool
    }

    属性

    queryString

    所用的查询字符串

    更新日志

    版本 说明
    8.0.0 现在 PDOStatement 的实现不是 Traversable 而是 IteratorAggregate。

    目录

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    用户贡献的备注 2 notes

    up
    16
    Gino D.
    7 years ago
    I don't know why PDOStatement don't return "execution time" and "found rows" so here I created an extended class of PDOStatement with these attributes.

    Just have to "setAttribute" of PDO's object to $PDO->setAttribute(\PDO::ATTR_STATEMENT_CLASS , ['\customs\PDOStatement', [&$this]]);

    <?php

    /**
    *
    *
    *
    */

    namespace customs;

    /**
    *
    *
    *
    */

    final class PDOStatement extends \PDOStatement {

    /**
    *
    *
    *
    */

    protected $PDO = null;
    protected     $inputParams = [];
    protected     $executionTime = 0;
    protected     $resultCount = 0;

    /**
    *
    *
    *
    */

    protected function __construct(PDO &$PDO) {
    $this->PDO = $PDO;
    $this->executionTime = microtime(true);
    }

    /**
    *
    *
    *
    */

    final public function getExecutionError(int $i = 2) {
    $executionError = $this->errorInfo();

    if (isset(    $executionError[$i]))
    return     $executionError[$i];

    return     $executionError;
    }

    /**
    *
    *
    *
    */

    final public function getExecutionTime($numberFormat = false, $decPoint = '.', $thousandsSep = ',') {
    if (    is_numeric($numberFormat))
    return     number_format($this->executionTime, $numberFormat, $decPoint, $thousandsSep);

    return     $this->executionTime;
    }

    /**
    *
    *
    *
    */

    final public function getResultCount($numberFormat = false, $decPoint = '.', $thousandsSep = ',') {
    if (    is_numeric($numberFormat))
    return     number_format($this->resultCount, $numberFormat, $decPoint, $thousandsSep);

    return     $this->resultCount;
    }

    /**
    *
    *
    *
    */

    final public function getLastInsertId() {
    return     $this->PDO->lastInsertId();
    }

    /**
    *
    *
    *
    */

    final public function bindValues(array $inputParams) {
    foreach (    $this->inputParams = array_values($inputParams) as $i => $value) {
    $varType = is_null($value) ? \PDO::PARAM_NULL : is_bool($value) ? \PDO::PARAM_BOOL : is_int($value) ? \PDO::PARAM_INT : \PDO::PARAM_STR;

    if (!    $this->bindValue(++ $i, $value, $varType))
    return     false;
    }

    return     true;
    }

    /**
    *
    *
    *
    */

    final public function execute($inputParams = null) {
    if (    $inputParams)
    $this->inputParams = $inputParams;

    if (    $executed = parent::execute($inputParams))
    $this->executionTime = microtime(true) - $this->executionTime;

    return     $executed;
    }

    /**
    *
    *
    *
    */

    final public function fetchAll($how = null, $className = null, $ctorArgs = null) {
    $resultSet = parent::fetchAll(... func_get_args());

    if (!empty(    $resultSet)) {
    $queryString = $this->queryString;
    $inputParams = $this->inputParams;

    if (    preg_match('/(.*)?LIMIT/is', $queryString, $match))
    $queryString = $match[1];

    $queryString = sprintf('SELECT COUNT(*) AS T FROM (%s) DT', $queryString);

    if ((    $placeholders = substr_count($queryString, '?')) < count($inputParams))
    $inputParams = array_slice($inputParams, 0, $placeholders);

    if ((    $sth = $this->PDO->prepare($queryString)) && $sth->bindValues($inputParams) && $sth->execute())
    $this->resultCount = $sth->fetchColumn();

    $sth = null;
    }

    return     $resultSet;
    }
    }
    ?>
    up
    0
    nmurzin at mail dot ru
    3 years ago
    I think I found a way to execute a protected SQL query and at the same time find out the number of affected records.
    I have the table 'tbl_users' with the following fields: id, login, password, age

    <?
    const DB_DRIVER = "mysql";
    const     DB_HOST = "localhost";
    const     DB_NAME = "my_db_name";
    const     DB_LOGIN = "root";
    const     DB_PASS = "root"; //OpenServer.

    $connectionString = DB_DRIVER.':host='.DB_HOST.';dbname='.DB_NAME;
    try
    {
    //Connect to database.
    $db = new PDO($connectionString, DB_LOGIN, DB_PASS);
    }
    catch(    PDOException $e)
    {
    die(    "Error: ".$e->getMessage());
    }
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    try
    {

    //Decreasing age for user 'nick1'.
    $prep1 = $db->prepare("UPDATE tbl_users SET age=age-1 WHERE login='nick1'");

    //Increasing age for user 'nick2'.
    $prep2 = $db->prepare("UPDATE tbl_users SET \r\n age=age+1 WHERE login='nick2'");

    //Start transaction.
    $db->beginTransaction(); //Table type must be InnerDB!

    //We assume that everything will be fine.
    $flagDone = true;

    //The exec() method returns the number of rows affected by the query.
    //$prep1->queryString is already an escaped SQL string.
    $result = $db->exec($prep1->queryString);
    if(    $result==false || $result!=1) //var_dump($result) - int(1) or bool(false).
    $flagDone = false;

    $result = $db->exec($prep2->queryString);
    if(    $result==false || $result!=1)
    $flagDone = false;

    if(    $flagDone)
    {
    if(    $db->commit())
    echo     "Transaction was successful";
    }
    else{
    echo     "Transaction fail";
    $db->rollback();
    }
    echo     "<br>";

    }
    catch(    PDOException $e)
    {
    die(    "Error: ".$e->getMessage());
    }
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