[SOLVED] Fatal error: Call to member function on...non-object...

[venturemc]

I'm back again...making slow progress on my class building experience, but everything seems very painful in PHP...

 

Keep getting the fatal error when I try to call a function from a class to another class. The identical syntax is working on a previous line in the class. There's a lot of code in this process; I'll try  to post just enough...

 

main class

<?php
class declaration {
......
include_once 'wp_form.cls.php';
// triple+ checked class spelling and path etc
........  
private $wpform; 
private $method;
private $action; 
.......  
  function set_method($m){
    if (isset($m)){
      $this->method = $m;
    }
    else{
      debug_var('method','->no value for $method in wpc set_method<-', $m); // debug_var is a function I wrote for debugging - not the issue     } 
  }
  function set_action($a){
    if (isset($a)){
      $this->action = $a;
    }
    else{
      debug_var('action','->no value for $action in wpc set_action<-', $a);
    } 
  }
  function get_form(){
    $wpform = new wp_form;
//problem is here vvvvvvvv
    $this->wpform = $this->wpform->get_wp_form($this->method, $this->action, $this->wptable);
} ?>

 

wp_form class (entire class)

 

<?php class wp_form{

  function get_wp_form($m, $a, $t){ // method, action, table      $wpform = '<form method ="' . $m . '" action="'. $a . '">';
    $wpform.= $t;
    $wpform.= '</form>';

    return $wpform; 
  }
} ?> 

 

section of php script that sets the object and calls the function

 
<? php
...........
  //method   $m = 'post'; //action   $a = 'addemail.php';
  $new_wp->set_method($m);
  $new_wp->set_action($a); 
  $new_wp->get_form();
........ ?>

 

$method and $action are setting correctly and $this->wptable is getting populated in an earlier step using similar methodology. I've verified that the object wpform is getting created as well. [/]

The syntax I'm using to populate wpform seems like it's more than I need, but it's the only syntax taht has worked in previous similar sections of the same class. I'm sure this is something stupid, but I can't find any syntax issues.[/]

 

PHP 5.3.0 if it matters...

 

(the overall project is to build a dynamic webpage. I know there's probably a thousand scripts out there that already do this, but I'm just busting my own chops here for practice)

[Philip]

$new_wp isn't an object (at least according to your title). You need to make it one in order to call members on it

[venturemc]

This isn't creating a new object?

  $wpform = new wp_form;

 

My debugger says it does.

Color me confused......

[Philip]

What about $new_wp?

$new_wp->set_method($m);

[venturemc]

Oh... sorry. 

 

That has been set earlier in the script and is successfully interacting with other methods.

[Philip]

Okay, so whats the exact error you are getting?

[venturemc]

Other than editing the path, here it is:

b>Fatal error</b>:  Call to a member function get_wp_form() on a non-object in <b>path------>\webpage.cls.php</b> on line <b>151</b><br />

[Philip]

Ahh okay I see the problem now, it's with scope.

 

function get_form(){
    $wpform = new wp_form;
    //problem is here vvvvvvvv
    $this->wpform = $this->wpform->get_wp_form($this->method, $this->action, $this->wptable);
}

$wpform's scope is local to that function, where as $this->wpform's scope is the class

 

It should read:

function get_form(){
    $this->wpform = new wp_form;
    //problem is here vvvvvvvv
    $this->wpform = $this->wpform->get_wp_form($this->method, $this->action, $this->wptable);
}

[venturemc]

Ah ha! I knew it something stupid. Thanks much!