调用非对象,其中实际上是一个对象


Calling to a non-object, where actually is an object

我对php脚本有问题。问题是它向我表明,我正在调用非对象的函数,但对象存在。

脚本是:

if ($dcdt_sql['pdo']) {
try {
    $dbh = new PDO(
        'mysql:host='.$dcdt_sql[0].';dbname='.$dcdt_sql[3],
        $dcdt_sql[1],
        $dcdt_sql[2],
        array(
            PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8",
            PDO::ATTR_PERSISTENT => false
        )
    );
}
catch (PDOException $e) { die("PDO ERR: [".$e->getMessage()."]"); }
}
else { $dbh = DBManager::connect(); }
switch ($mode) {
case 'fetch_assoc':
    if ($dcdt_sql['pdo']) {
        try {
            $sth = $dbh->prepare($sqlQuery)->execute();
            $result = $sth->fetchAll(PDO::FETCH_ASSOC); // PROBLEM IS IN THIS LiNE
            $return = $result;
        }
        catch (PDOException $e) { die("PDO ERR: [".$e->getMessage()."]"); }
    }
    else {
        $result = $dbh->query($sqlQuery);
                    if (!is_object($result)) { die('DEBUG: Query error: ['.$sqlQuery.'] returned: ['.print_r($result,1).']'); }//DEBUG
        while ($row = $result->fetch_assoc()) {
            $list[] = $row;
        }
        $return = $list;
    }
break;

问题是我评论它的地方,但它应该是一个调用函数的对象。所以我不明白。

我得到的错误:

致命错误:在第 102 行的/usr/local/www/apache22/data/centrs/dc_elec/report.lib.inc 中的非对象上调用成员函数 fetchAll()

提前谢谢你。

http://sg.php.net/manual/en/pdostatement.fetchall.php

按照规定正确用法:

<?php
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();
/* Fetch all of the remaining rows in the result set */
print("Fetch all of the remaining rows in the result set:'n");
$result = $sth->fetchAll();
print_r($result);

execute 方法返回 TRUE 或 FALSE,而不是对象。尝试

$sth = $dbh->prepare($sqlQuery);
$sth->execute();
$result = $sth->fetchAll(PDO::FETCH_ASSOC);

也许可以尝试

$sth = $dbh->prepare($sqlQuery);
$sth->execute();
$result = $sth->fetchAll(PDO::FETCH_ASSOC); // PROBLEM IS IN THIS LiNE
$return = $result;

尝试:

        $sth = $dbh->prepare($sqlQuery);
        $sth->execute();
        $result = $sth->fetchAll(PDO::FETCH_ASSOC); // PROBLEM IS IN THIS LiNE
        $return = $result;

这应该有效,因为 execute 将返回布尔值,而不是对象本身。对代码其余部分的批评;当你使用对象时,请查看多态性,如果你把"脏工作"放到专用对象中,这些if/else语句应该是不必要的。