problem when printing class's variables

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  • Derpost
    New Member
    • Aug 2012
    • 1
    #1

    problem when printing class's variables

    I'm creating a system like MVC.
    I'm using below class when I want to call view files.

    Code:
    <?php 
class Call{    
    function __construct($fileName) {
        //$this->db = new Database;
        self::callFile($fileName);
    }

    function callFile($fileName)
    {
        $this->title = "example";
        $this->description = "example";
        $this->keywords = "example";
        $fileName = $fileName . '.php';
        require PAGESPATH.'common/header.php';
        require PAGESPATH.$fileName;
        require PAGESPATH.'common/footer.php';
    }
}
?>
    $fileName is index.php. Index.php has only

    Code:
    Index Page..
    I want to print data in header.php like below:
    Code:
    <html>
    <head>
        <meta charset="utf-8">
    <title><?php if(isset($this->title)){echo $this->title;} ?> - WebProgramlama.tk</title>
    <meta name="description" content="<?php if(isset($this->description)){echo $this->description;}?>" />
    <meta name="keywords" content="<?php if(isset($this->keywords)){echo $this->keywords;} ?>" />
   </head>
   <body>
    But I'm getting errors.
    Code:
    Fatal error: Using $this when not in object context in /var/www/webprogramlama/class/pages/common/header.php on line 4
    What can i solve this problem?

    Note: Please be careful! header.php is calling by Call class. header.php is inside of Call class.
    Tags: None
    • Claus Mygind
      Contributor
      • Mar 2008
      • 571
      #2
      Code:
          <?php 
    class Call{ 
//declare your properties first
            public $title;
            public $description;
            public $keywords;

   
        function __construct($fileName) {
            //$this->db = new Database;
            self::callFile($fileName);
        }
     
        function callFile($fileName)
        {
//then you should be able to use them in your methods later       
            $this->title = "example";
            $this->description = "example";
            $this->keywords = "example";
            $fileName = $fileName . '.php';
            require PAGESPATH.'common/header.php';
            require PAGESPATH.$fileName;
            require PAGESPATH.'common/footer.php';
        }
    }
    ?>
      you may even learn more at this link http://www.php.net/manual/en/language.oop5.basic.php

      here is the php manual example


      <?php
      class SimpleClass
      {
      // property declaration
      public $var = 'a default value';

      // method declaration
      public function displayVar() {
      echo $this->var;
      }
      }
      ?>

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