PHP use class function on sub-functions

Question

i have test class with one function , after including that i can use this class function with included pages but i cant use this function on included page's functions, for example:

testClass.php:

class test
{
    public function alert_test( $message )
     {
       return $message;
     }
}

including class: in this using class i dont have problem

text.php:

<?php
include 'testClass.php';
$t= new test;
echo alert_test('HELLO WORLD');
?>

but i cant use alert_test function with this method:

<?php
include 'testClass.php';
$t= new test;
function test1 ( $message )
{
       echo alert_test('HELLO WORLD');
/*
       OR

       echo $t->alert_test('HELLO WORLD');
*/
 }
 ?>

i want to use test class in sub-functions

Tom Naessens · Accepted Answer · 2013-05-26 16:18:06Z

1

What about echo $t->alert_test('HELLO WORLD');? You have to 'tell' PHP where he has to find that function, in this case in $t which is an instance of the test class.

<?php
include 'testClass.php';
function test1 ( $message )
{
   $t = new test;
   echo $t->alert_test('HELLO WORLD');
}
?>

edited May 26, 2013 at 16:18

answered May 26, 2013 at 16:12

Tom Naessens

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1 Comment

user2388554 Over a year ago

Call to a member function alert_test() on a non-object in ...

Simone · Accepted Answer · 2013-05-26 16:23:27Z

0

You should pass the instance ($t) to your function, i.e:

<?php

class test
{
    public function alert_test( $message )
     {
       return $message;
     }
}

$t = new test;

function test1 ( $message, $t )
{
    echo $t->alert_test('HELLO WORLD');
}

As an alternative (better IMHO) you could declare your function as static, so that you don't even need to instantiate the test class, i.e:

class Message {
  static function alert($message) {
    echo $message;
  }
}

function test_alert($msg) {
  Message::alert($msg);
}

test_alert('hello world');

edited May 26, 2013 at 16:23

answered May 26, 2013 at 16:16

Simone

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1 Comment

user2388554 Over a year ago

thanks, but i dont like use alert_test function in class file

moonwave99 · Accepted Answer · 2013-05-26 16:16:26Z

0

You should "have problem" even in your first example, because alert_test() is an instance function of your test class.

You have to invoke instance methods as:

$instance -> method( $params );

So:

$t -> alert_test();

But local functions [as your test1] should not rely on global objects: pass them as a function argument, if you need.

answered May 26, 2013 at 16:16

moonwave99

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Comments

Dmitrii Tarasov · Accepted Answer · 2013-05-26 16:22:38Z

0

You can use closures:

$t = new test;
function test1($message) use ($t) {
    $t->test_alert($message);
}

answered May 26, 2013 at 16:22

Dmitrii Tarasov

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