Building a simple array - some help needed !

[jeddiki]

Hi,

I am stepping though a table and want to display the output after
the stepping through has finished and I have calculated the pagination.

So I think that I need to put the results into and array and then
print out the array a bit later on.

I am a bit rusty on creating arrays

This is my php:

while($row = mysql_fetch_assoc($result)){
  extract($row);
  $Rctr =$row_ctr+1;
  $scn = strtolower(trim($sc_name));
  $link1 = "/internet_marketing/online_tuition/".$SEOcat."/".$tute_id.".html";
  $link2 = "/internet_guru/$scn/".$user_id.".html";
        
  echo "<div class=\"listerdiv\">
  <h2>$Rctr) <a href=\"$link1\">$tute_head</a></h2>
  <h3>By  <a href='$link2'>$sc_name</a></h3>
  </div>";

 $row_ctr = $row_ctr + 1;
 $ad_ctr = $ad_ctr + 1;            
}  // end while

I realise that the data in inside an array called $row, but that is going to be replaced at the next loop of the while. Also the $link1 & 2 will change with each loop.

Its going to loop 20 times and then after its finished, I will calculate some
stuff and display the results of that stuff, and then I want to display the
results from those twenty loops.

So thats what I need the extra array for.
Can anyone help me out with this one ?

[Dormilich]

Building an Object Array

If you want to go for some crazy stuff you can put your results into objects

// example using PDO
$array = $PDOstmt->fetchAll(PDO::FETCH_CLASS, 'your_class');
// or
$array = $PDOstmt->fetchAll(PDO::FETCH_CLASS | PDO::FETCH_PROPS_LATE, 'your_class');

the class methods are responsible for preparing the output, you just need to define the methods.

class your_class
{
    // properties according to the fieldnames

    function __construct($ini = "default")
    {
        // executed before or after creation (dep. on setting)
    }

    function __toString() // called by echo, print, ...
    {
        $str = "<a href='$this->link2'>$this->sc_name</a>"; // just an example
        return $str;
    }
}

and finally printing all out.

foreach ($array as $obj)
{
    echo $obj; // calling the __toString() method
}

this is a rather rough and short proposal, but it's not much code and lots of fun.

[jeddiki]

Wow !! -
I don't do any php with objects and classes.

I haven't really got my head round it yet.

Actually - I dont even know what PDO is !
Is it short for something ?
Is fetchAll() a php cmd ?

I don't know if this is the time to start with objects and stuff
it looks like a completely different coding language !

[Dormilich]

I haven't really got my head round it yet.

time to get started

Actually - I dont even know what PDO is !
Is it short for something ?
Is fetchAll() a php cmd ?

PDO = PHP Data Objects, PHP: PDO - Manual
fetchAll() is one of PDO's methods to get the SQL results. (basicly, take all results and put them into an array)

I don't know if this is the time to start with objects and stuff it looks like a completely different coding language !

only at the beginning, the biggest problem is to understand how to use them.
introduction to objects: PHP: Classes and Objects (PHP 5) - Manual

[jeddiki]

I suppose I had better search for a good beginners tute ?

Can you recommend any to get me started ?

[Dormilich]

first, read a bit on PHP's website (see above).

right now I have no tutorial on my mind, but a very good source for any PHP programming is "PHP Power Programming" (PDF available for free, just google for it)

a good phrase for google searching is probably "OOP Tutorial"

regards

and of cause you can always ask us on bytes.com *g*

[jeddiki]

Hi I have been trying out a bit of OOP !

This is what I wrote:

<?php
class person {
  var $name;     
      public $height;
      protected $social_insurance;
      private $pinn_number;


  function __construct($persons_name) {
    $this->name = $persons_name;
  }
	
  function set_name($new_name) {  
   $this->name = $new_name;            
  }

	function set_pinn_number($new_pinn_number) {  
   $this->pinn_number = $new_pinn_number;            
  }
	
  function get_name() {
    return $this->name;
  }
	
	function get_pinn_number() {
     return $this->pinn_number;
  }     
} // end class


?>

and

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>OOP in PHP</title>

<?php include("class_lib.php"); ?>

</head>
<body>

<?php
      $jimmy = new person;
      $jimmy->set_name("Nick Giggings");

			$number->set_pinn_number("345678");
			
      $stefan = new person("Stefan Mischook");

echo "Stefan's full name: " . $stefan->get_name()."<br>";
echo "Nick's full name: " . $jimmy->get_name();

echo "Tell me private stuff: " . $number->get_pinn_number;

echo "hello";
?>
 </body>
</html>

Now the problenm is that it doesn't out put anything and
dosn't give any error mesagges !

Thats not very user friendly !
How can I debug something ?

[Dormilich]

Now the problenm is that it doesn't out put anything and dosn't give any error mesagges !

How can I debug something ?

you probably have error messages turned off.

I've seen following: (all second code)

- line 13: missing parameter for constructor method
- line 16: object not defined
- line 23: call to undefined object, property not defined

and now the error messages I got (line numbers do not correspond)

Warning: Missing argument 1 for person::__const ruct(), called in /- on line 31 and defined in /- on line 9

Notice: Undefined variable: persons_name in /- on line 10

Notice: Undefined variable: number in /- on line 34

Fatal error: Call to a member function set_pinn_number () on a non-object in /- on line 34

[jeddiki]

Yep,
You were right ;)

I am now displaying errors.

[Dormilich]

instead of

function get_pinn_number() {
      return $this->pinn_number;
}     
// and
echo "Tell me private stuff: " . $stefan->get_pinn_number();

better write

function get_pinn_number() {
      echo "Tell me private stuff: " . $this->pinn_number;
}     
// and
$stefan->get_pinn_number();

this is what using objects is about. (let the class do the hard work)

regards