DB Class word niet geinclude.

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Stefan Candan

Stefan Candan

10/07/2010 09:33:30
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Ik ben bezig met een site te maken dmv OOP PHP. Nu loop ik echter vast, omdat mijn database class niet functioneerd.

Index.php:
Code (php)
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    
<html xmlns="http://www.w3.org/1999/xhtml">

    <head>
    
        <meta http-equiv="Content-Type" content="text/html;
        charset=iso-8859-1" />
        
        <title>
        
            OOP in PHP
            
        </title>
        
        <?php

            include("config.php");
            include("class_lib.php");
            
        ?>

    </head>
    
    <body>
    
        <?php
            
            echo "Query time: ".$db->GetDBTime() ."<br />";
            echo "Queries Executed: ".$db->getSqlCount() ."<br />";
            $stefan = new person();
            $stefan->set_name('Candan');
            $stefan->set_age(17);
            $stefan->set_race('Caucasian');
            $stefan->set_birthday('Dec-21-1992');
            $stefan->set_email('[email protected]');
            
            $stefan->get_data($stefan->name);
            
        ?>

    
    </body>
    
</html>


db_lib.php
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<?php

    class DBManager{

        var
$connection = '';
        var
$queryCounter = 0;
        var
$totalTime = 0;
        var
$errorCode = 0;
        var
$errorMsg = '';
        var
$resultSet = '';
        
        function
DBConnect($host, $user, $pass, $db) {
        
            $startTime = $this->getMicroTime();
            
            if(!$this->connection = @mysql_connect($host, $user, $pass, true)) {
            
                $this->errorCode = mysql_errno();
                $this->errorMsg = mysql_error();
                return false;
            
            }

            
            if(!@mysql_select_db($db, $this->connection)) {
            
                $this->errorCode = mysql_errno();
                $this->errorMsg = mysql_error();
                @
mysql_close($this->connection);
                return false;
            
            }

            
            $this->totalTime += $this->getMicroTime() - $startTime;
            
            return true;
                
        }
        
        function
executeQuery($sql) {
        
            $startTime = $this->getMicroTime();
            ++
$this->queryCounter;
            
            if(!$this->resultSet = @mysql_query($sql, $this->connection)) {
            
                $this->errorCode = mysql_errno();
                $this->errorMsg = mysql_error();
                $this->totalTime += $this->getMicroTime() - $startTime;
                return false;
                
            }

            
            $this->totalTime += $this->getMicroTime() - $startTime;
            return $this->resultSet;
            
        }
        
        function
getAffectedRows() {
        
            return @mysql_affect_rows($this->connection);
        
        }
        
        function
getSelectedRows() {
        
            return @mysql_num_rows($this->resultSet);
            
        }
        
        function
getInsertID() {
        
            return @mysql_insert_id($this->connection);
        
        }
        
        function
loadResult() {
        
            $array = array();
            while($row = mysql_fetch_object($this->resultSet)) {
            
                $array[] = $row;
            
            }

            
            mysql_free_result($this->resultSet);
            
            return $array;
        
        }

        function
getErrrorCode(){
        
            return $this->errorCode;
        
        }
    
        function
getErrorMessage(){
        
            return $this->errorMsg;
        
        }
        
        function
getDBTime() {
        
            return round($this->totalTime, 6);
        
        }
        
        function
getSqlcount() {
        
            return $this->queryCounter;
            
        }
        
        function
getMicroTime() {
        
            list($usec, $sec) = explode(" ", microtime());
            return ((float)$usec + (float)$sec);
        
        }
        
    }


?>


class_lib.php
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<?php
    
    include("db_lib.php");
    include("config.php");
    
    $db = new DBManager();
    $db->DBConnect($_CONFIG['Host'], $_CONFIG['User'], $_CONFIG['Pass'], $_CONFIG['Name']);

    
    class person {
    
        var
$name;
        var
$age;
        var
$race;
        var
$birthday;
        var
$email;
                
        function
set_name($new) {
            
            $this->name = $new;
        
        }
        
        function
set_age($new) {
        
            $this->age = $new;
            
        }
        
        function
set_race($new) {
        
            $this->age = $new;
            
        }
        
        function
set_birthday($new) {
        
            $this->birthday = $new;
            
        }
        
        function
set_email($new) {
        
            $this->email = $new;
            
        }
        
        function
get_data($name) {
        
            $q = "SELECT * FROM persons WHERE name = '".$name."'";
            if(!$res = $db->executeQuery($q)) {
                echo "There was an error retrieving data from the database. <br />";
                echo "Error code: ".$db->getErrorCode .'<br />';
                echo "Error Message: ".$db->getErrorMessage .'<br />';
                echo "Query: ".$q;
            }
else {
                if($db->getSelectedRows($res) == 0) {
                    echo "No data found. <br /> Inserting data, Please be patient.<br />";
                    insert_data();
                    echo "Inserted data.";
                }
else {
                    echo "<pre>".print_r($res, true)."</pre>";
                }
            }
        }
        
        function
insert_data() {
        
            $q = "INSERT INTO persons (name, age, race, birthday, email) VALUES('".$this->name."', ".$this->age.", '".$this->race."', '".$this->birthday."', '".$this->email."')";
            if(!$res = $db->executeQuery($q)) {
                echo "There was an error insert data into the database. <br />";
                echo "Error code: ".$db->getErrorCode .'<br />';
                echo "Error Message: ".$db->getErrorMessage .'<br />';
                echo "Query: ".$q;
            }
else {
                echo "Query: ".$q."<br />";
                echo "Affected Rows: ".$db->getAffectedRows() ."<br />";
            }
        }
    }

    
?>


En in mijn config staat gewoon de mysql info.

Wat ik krijg op mijn index:

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Query time: 0.004515
Queries Executed: 0

Notice: Undefined variable: db in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\oop\class_lib.php on line 51

Fatal error: Call to a member function executeQuery() on a non-object in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\oop\class_lib.php on line 51
Gewijzigd op 10/07/2010 09:34:31 door Stefan Candan
 
PHP hulp

PHP hulp

05/11/2024 15:34:38
 
P Lekensteyn

P Lekensteyn

10/07/2010 10:11:07
Quote Anchor link
Kijk zelf op regel 51 in class_lib.php.
Dan zie je $db->executeQuery.
Wat zegt de foutmelding?
Je roept een functie aan op een niet-object (geen class dus).

Kijk je iets hoger, dan zie je dat PHP gelijk heeft.
Je hebt $db in de globale scope gedefinieerd, maar deze wordt niet autonatisch beschikbaar in de huidige scope.
Plaats nog even 'global $db;' op regel 49.

Je kunt beter een referentie naar de databaseklasse plaatsen in een member variable van Class person.
 
Stefan Candan

Stefan Candan

10/07/2010 16:54:07
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En hoe doe ik dat laatste? Als ik een var $db = new DBManager(); maak zegt hij dat new daar niet thuis hoort.

Ik doe het nu met de globals, maar 1 ding werkt niet.
De queryCounter werkt niet. Hij blijft op 0 staan, terwijl er toch echt wel een query word gemaakt.
 



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