What is wrong with this code?

siu02rk

Hi all,

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
$Message = "Default Message";

Test($Message)
{
$this->$Message=$Message;
}

Display_Message()
{
echo "$Message";
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>
</body>
</html>
Thanks in advance for your help.

Jul 17 '05 #1

Subscribe Post Reply

1452

Justin Koivisto

siu02rk wrote:

Hi all,

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
$Message = "Default Message";

Test($Message)
{
$this->$Message=$Message;
change to:
$this->Message=$Message;
}

Display_Message()
{
echo "$Message";
change to:
echo $this->Message;
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>
</body>
</html>
Thanks in advance for your help.

--
Justin Koivisto - sp**@koivi.com
http://www.koivi.com

Jul 17 '05 #2

Justin Koivisto

Justin Koivisto wrote:

siu02rk wrote:
Hi all,

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
$Message = "Default Message";
Test($Message)
(Missed some)
change to:
function Test($Message)
{
$this->$Message=$Message;

change to:
$this->Message=$Message;
}

Display_Message()
change to:
function Display_Message()
{
echo "$Message";

change to:
echo $this->Message;
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>
</body>
</html>
Thanks in advance for your help.

--
Justin Koivisto - sp**@koivi.com
http://www.koivi.com

Jul 17 '05 #3

Alvaro G. Vicario

*** siu02rk escribió/wrote (2 Sep 2004 13:22:49 -0700):

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
Some quick remarks...
<?php
class Test
{
$Message = "Default Message";
var $Message='Default Message';

Test($Message)
{
$this->$Message=$Message;
}
$this->Message=$Message;

Display_Message()
{
echo "$Message";
}
echo $this->Message;
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>

$TestObject->Display_Message();

--
--
-+ Álvaro G. Vicario - Burgos, Spain - ICQ 46788716
+- http://www.demogracia.com (la web de humor para mayores de 100 años)
++ «Sonríe, que te vamos a hacer una foto para la esquela»
--

Jul 17 '05 #4

Janwillem Borleffs

siu02rk wrote:

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
[...] <?php
class Test
{
$Message = "Default Message";
In PHP 4 this should read:

var $Message = "...";

In PHP 5:

public/private/protected $Message = "...";

e.g.:

private $Message = "...";

Test($Message)
{
$this->$Message=$Message;
}

This should read:

function Test($Message) {
$this->Message=$Message;
}
Display_Message()
This should read:

function Display_Message()
Thanks in advance for your help.

Welcome. But now it's time to help yourself by starting to read the
following manual pages carefully:

http://www.php.net/manual/en/language.oop.php
JW

Jul 17 '05 #5

kingofkolt

"siu02rk" <si*****@hotmail.com> wrote in message
news:82**************************@posting.google.c om...

Hi all,

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
$Message = "Default Message";

Test($Message)
{
$this->$Message=$Message;
}

Display_Message()
{
echo "$Message";
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();

change to:
$TestObject->Display_Message(); // (capitalization error)

Jul 17 '05 #6

Gary L. Burnore

On Thu, 02 Sep 2004 22:23:29 GMT, "kingofkolt"
<je**********@comcast.net> wrote:

"siu02rk" <si*****@hotmail.com> wrote in message
news:82**************************@posting.google. com...
Hi all,

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
$Message = "Default Message";

Test($Message)
{
$this->$Message=$Message;
}

Display_Message()
{
echo "$Message";
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();

change to:
$TestObject->Display_Message(); // (capitalization error)

And, less importantly, change </test> to </title>
--
gburnore@databasix dot com
---------------------------------------------------------------------------
How you look depends on where you go.
---------------------------------------------------------------------------
Gary L. Burnore | ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
DataBasix | ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ 3 4 1 4 2 Ý³Þ³ 6 9 0 6 9 ÝÛ³
Black Helicopter Repair Svcs Division | Official Proof of Purchase
================================================== =========================
Want one? GET one! http://signup.databasix.com
================================================== =========================

Jul 17 '05 #7

siu02rk

Gary L. Burnore <gb******@databasix.com> wrote in message news:<ch**********@blackhelicopter.databasix.com>. ..

On Thu, 02 Sep 2004 22:23:29 GMT, "kingofkolt"
<je**********@comcast.net> wrote:
"siu02rk" <si*****@hotmail.com> wrote in message
news:82**************************@posting.google. com...
Hi all,

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
$Message = "Default Message";

Test($Message)
{
$this->$Message=$Message;
}

Display_Message()
{
echo "$Message";
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();

change to:
$TestObject->Display_Message(); // (capitalization error)

And, less importantly, change </test> to </title>
--
gburnore@databasix dot com
---------------------------------------------------------------------------
How you look depends on where you go.
---------------------------------------------------------------------------
Gary L. Burnore | ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
DataBasix | ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ 3 4 1 4 2 Ý³Þ³ 6 9 0 6 9 ÝÛ³
Black Helicopter Repair Svcs Division | Official Proof of Purchase
================================================== =========================
Want one? GET one! http://signup.databasix.com
================================================== =========================

Hi All,

My code is now :

<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
var $Message = "Default Message";

function Test($Message)
{
$this->Message=$Message;
}

function Display_Message()
{
this->echo Message;
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>
</body>
</html>

But it still does not work!! Can anyone help? Thanks again for your help.

Jul 17 '05 #8

Jasper Bryant-Greene

siu02rk wrote:

Gary L. Burnore <gb******@databasix.com> wrote in message news:<ch**********@blackhelicopter.databasix.com>. ..
On Thu, 02 Sep 2004 22:23:29 GMT, "kingofkolt"
<je**********@comcast.net> wrote:

"siu02rk" <si*****@hotmail.com> wrote in message
news:82**************************@posting.googl e.com...

Hi all,

I am trying to get an understanding of classes within PHP. What is
wrong with this code:
<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
$Message = "Default Message";

Test($Message)
{
$this->$Message=$Message;
}

Display_Message()
{
echo "$Message";
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();

change to:
$TestObject->Display_Message(); // (capitalization error)

And, less importantly, change </test> to </title>
--
gburnore@databasix dot com
---------------------------------------------------------------------------
How you look depends on where you go.
---------------------------------------------------------------------------
Gary L. Burnore | ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
DataBasix | ÝÛ³ºÝ³Þ³ºÝ³³ÝÛºÝ³Þ³ºÝ³Ý³Þ³ºÝ³ÝÝÛ³
| ÝÛ³ 3 4 1 4 2 Ý³Þ³ 6 9 0 6 9 ÝÛ³
Black Helicopter Repair Svcs Division | Official Proof of Purchase
================================================ ===========================
Want one? GET one! http://signup.databasix.com
================================================ ===========================

Hi All,

My code is now :

<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
var $Message = "Default Message";

function Test($Message)
{
$this->Message=$Message;
}

function Display_Message()
{
this->echo Message;
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>
</body>
</html>

But it still does not work!! Can anyone help? Thanks again for your help.

In function Display_Message(),

this->echo Message;

should be

echo this->Message;

--
Jasper Bryant-Greene
Cabbage Promotions

Jul 17 '05 #9

kingofkolt

"Jasper Bryant-Greene" <ja**@fatalnetwork.com> wrote in message
news:ff********************@news.xtra.co.nz...

siu02rk wrote:

Hi All,

My code is now :

<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
var $Message = "Default Message";

function Test($Message)
{
$this->Message=$Message;
}

function Display_Message()
{
this->echo Message;
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>
</body>
</html>

But it still does not work!! Can anyone help? Thanks again for your
help.
In function Display_Message(),

this->echo Message;

should be

echo this->Message;

--
Jasper Bryant-Greene
Cabbage Promotions

And the last line of your PHP block should be
$TestObject->Display_Message();

Capitalization matters when it comes to variable names. As you had it,
$Testobject contains nothing, but $TestObject contains the object Test.

- JP

Jul 17 '05 #10

Matthias Esken

siu02rk wrote:

<html>
<title> This is my test for creating a class </test>
<body>
<?php
class Test
{
var $Message = "Default Message";

function Test($Message)
{
$this->Message=$Message;
}

function Display_Message()
{
this->echo Message;
}
}

$TestObject = new Test("Hello World!!");
$Testobject->Display_Message();
?>
</body>
</html>
Please set your error_reporting to E_ALL and have a look at the error
messages. If you would do that and would care to read the documentation,
you could stop bothering us with this basic stuff.
this->echo Message;
This line produces the following error:

| Parse error: parse error, unexpected T_OBJECT_OPERATOR in [filename] on line 16

You've made two mistakes here. First you forgot the $ as the first
character of the variable name. Then you're trying to call a function
echo() in this class with an undefined local variable named $Message.
What you really want is:
echo $this->Message;

$Testobject->Display_Message();

This line produces the following error:

| Fatal error: Call to a member function on a non-object in [filename] on line 21

You created an instance of the class with the name $TestObject and you
try to access a variable with the name $Testobject. Do you see the
difference? Change this to:
$TestObject->Display_Message();
Matthias

Jul 17 '05 #11

Similar topics

125

What so special about PostgreSQL and other RDBMS?

by: Sarah Tanembaum | last post by:

Beside its an opensource and supported by community, what's the fundamental differences between PostgreSQL and those high-price commercial database (and some are bloated such as Oracle) from...

Microsoft SQL Server

What makes a good C/C++ programmer?

by: E. Robert Tisdale | last post by:

What makes a good C/C++ programmer? Would you be surprised if I told you that it has almost nothing to do with your knowledge of C or C++? There isn't much difference in productivity, for...

C / C++

121

What IDE are you using?

by: typingcat | last post by:

First of all, I'm an Asian and I need to input Japanese, Korean and so on. I've tried many PHP IDEs today, but almost non of them supported Unicode (UTF-8) file. I've found that the only Unicode...

PHP

what is wrong with the goto command?

by: WindAndWaves | last post by:

Can anyone tell me what is wrong with the goto command. I noticed it is one of those NEVER USE. I can understand that it may lead to confusing code, but I often use it like this: is this...

Microsoft Access / VBA

What C# Needs

by: Keith K | last post by:

Having developed with VB since 1992, I am now VERY interested in C#. I've written several applications with C# and I do enjoy the language. What C# Needs: There are a few things that I do...

C# / C Sharp

What does it mean?

by: Jason Huang | last post by:

Hi, Would someone explain the following coding more detail for me? What's the ( ) for? CurrentText = (TextBox)e.Item.Cells.Controls; Thanks. Jason

C# / C Sharp

what went wrong with my combo box?

by: GS | last post by:

I got a combobox box that I load at load time. the Item and vales ended up in reverse order of each other, what went wrong? the database table has the following row code value ebay ...

Visual Basic .NET

Repetitive XML comments -- what's the point?

by: tjb | last post by:

I often see code like this: /// <summary> /// Removes a node. /// </summary> /// <param name="node">The node to remove.</param> public void RemoveNode(Node node) { <...> }

C# / C Sharp

what is wrong with my code?

by: Pyenos | last post by:

import cPickle, shelve could someone tell me what things are wrong with my code? class progress: PROGRESS_TABLE_ACTIONS= DEFAULT_PROGRESS_DATA_FILE="progress_data" PROGRESS_OUTCOMES=

Python

What's wrong ?

by: Daniel.C | last post by:

Hello. I just copied this code from my book with no modification : #include <stdio.h> /* count characters in input; 1st version */ main() { long nc; nc = 0;

C / C++

Easy Steps to Fix "Canon Printer Won't Connect to WiFi Network"

by: taylorcarr | last post by:

A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...

General

How to turn on java script in a villaon keypad mobile phone

by: Charles Arthur | last post by:

How do i turn on java script on a villaon, callus and itel keypad mobile phone

Java

Merging data from multiple Excel files

by: ryjfgjl | last post by:

In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...

Data Management

Navigating the Data Structures and Algorithms (DSA)

by: BarryA | last post by:

What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...

Algorithms / Advanced Math

Is that possible of reading the .csv file in column wise and the column have different lengths ?

by: Sonnysonu | last post by:

This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

C / C++

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...

General

Changing the language in Windows 10

by: Hystou | last post by:

Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...

Windows Server

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...

C / C++

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

by: jinu1996 | last post by:

In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...

Online Marketing