Nathan Rixham schreef:
Ben Stones wrote:
Hi,
The following bit of code doesn't output anything:
<?php
class output {
var $text;
function outputText() {
$this->text = "Hello World";
echo $this->text;
}
}
$class = new output();
$class->outputText;
?>
As well as the following code:
<?php
class output {
var $text=5;
function outputText() {
echo $this->text;
}
}
$class = new output();
$class->outputText;
?>
Am I doing anything wrong? By the way, the preceding code is just so I
understand OOP which finally I've grasped, but am I doing anything
wrong as
both codes don't output anything?
it's the lack of a methodCall()
$class->outputText; <<don't work
$class->outputText;
references an undefined property of the class instance,
turning on error_reporting to full (i.e. including E_NOTICE)
would have given a hint to the OP (assuming he has display_error ON
or he is reading his error log) as to what was going on.
as an example, try running this:
<?
class Foo {
public $a = "A\n";
private $b = "B\n";
static $d = "D\n";
function b() { echo $this->b; }
static function d() { echo self::$d; }
static function e() { echo "E\n"; }
}
ini_set('display_errors', true);
ini_set('error_reporting', E_ALL ^ E_STRICT);
$f = new Foo;
echo $f->a;
echo $f->b();
echo $f->c;
echo $f->d();
echo $f->d;
echo Foo::d();
echo Foo::$d;
echo $f->e();
echo Foo::e();
// the following are fatal errors:
echo $f->b;
echo Foo::b();
?>
$class->outputText(); <<will work
while you're there why not learn the php5 way?
quite right :)
<?php
class output {
private $text;
public function outputText( $text='default text' )
{
$this->text = $text;
return $this->text;
}
}
$class = new output;
$class->outputText();
?>
just a suggestion save you double learning! good choice on the OO though
nathan
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