class ...

[Anon]

Hi, friends.

Please.How I make to destroy a class?

Thanks advance.

Paulo Augusto
[e-mail]

[Anon]

If you want to destroy an INSTANCE of a class, you can simply use:

unset($instance);

And that will do it.

Hope that helps:

Chris King

[Anon]

Inside of the loop of my program, I make called to a routine that creates diverse class. It would like to destroy these class to each pass inside of my loop " for". Message of error of my program:

"Fatal error: Cannot redeclare class barcodeobject in /home/httpd/transito/www/fiscalizacao/barcode.php on line 89"

Which the best procedure?

Thanks.

Paulo Augusto M Pereira.

[deimosaffair]

Hello. Portuga?

Anyway, that error is not about instantiation.

It means you're trying to redeclare the same class several times. Perhaps you have a require or include inside the loop.

[deimosaffair]

Another thing about classes.

Suppose i have a class X, and another class X_expansion.
Now, X has a function called do_stuff()and X_expansion redefines do_stuff().

so, if i create an object of type X_expansion, is there any way i can call do_stuff from X ?

say, something like $parent->do_stuff() or $this->X.do_stuff()

My problem is that X->do_stuff() has a lot of code, and X_expansion->do_stuff() just does a little thing more and then is exactly like X->do_stuff().

And i don't like the idea of making a huge copy-paste....

[Anon]

Hi,
I'm not Portuga, i'm brasileiro.
Do you speak portuguese ?

It's my problem:

class BarcodeObject {

var $mWidth, $mHeight, $mStyle,  $mBgcolor, $mBrush;
var $mImg, $mFont;
var $mError;

function BarcodeObject ($Width = BCD_DEFAULT_Width, $Height = BCD_DEFAULT_HEIGHT, $Style = BCD_DEFAULT_STYLE)  {
    $this->mWidth   = $Width; 
	$this->mHeight  = $Height;
	$this->mStyle   = $Style; 
	$this->mFont    = BCD_DEFAULT_FONT;
	$this->mImg  	= ImageCreate($this->mWidth, $this->mHeight);
	$dbColor        = $this->mStyle & BCS_REVERSE_COLOR ? BCD_DEFAULT_FOREGROUND_COLOR : BCD_DEFAULT_BACKGROUND_COLOR;
	$dfColor        = $this->mStyle & BCS_REVERSE_COLOR ? BCD_DEFAULT_BACKGROUND_COLOR : BCD_DEFAULT_FOREGROUND_COLOR;
	$this->mBgcolor = ImageColorAllocate($this->mImg, ($dbColor & 0xFF0000) >> 16, 
					  ($dbColor & 0x00FF00) >> 8 , $dbColor & 0x0000FF);		   
	$this->mBrush   = ImageColorAllocate($this->mImg, ($dfColor & 0xFF0000) >> 16, 
							  ($dfColor & 0x00FF00) >> 8 , $dfColor & 0x0000FF);
	if (!($this->mStyle & BCS_TRANSPARENT)) {  	  							    
		ImageFill($this->mImg, $this->mWidth, $this->mHeight, $this->mBgcolor); 
	}
  __TRACE__("OBJECT CONSTRUCTION: ".$this->mWidth." ".$this->mHeight." ".$this->mStyle);
}

function DrawObject ($xres)	{
  /* there is not implementation neded, is simply the asbsract function. */
 __TRACE__("OBJECT DRAW: NEED VIRTUAL FUNCTION IMPLEMENTATION");
 return false;
}

function DrawBorder () {
    ImageRectangle($this->mImg, 0, 0, $this->mWidth-1, $this->mHeight-1, $this->mBrush);
    __TRACE__("DRAWING BORDER");
}

function DrawChar ($Font, $xPos, $yPos, $Char) {
  	  ImageString($this->mImg,$Font,$xPos,$yPos,$Char,$this->mBrush);
}

function DrawText ($Font, $xPos, $yPos, $Char) {
  	  ImageString($this->mImg,$Font,$xPos,$yPos,$Char,$this->mBrush);
}   

function DrawSingleBar($xPos, $yPos, $xSize, $ySize) {
  if ($xPos>=0 && $xPos<=$this->mWidth  && ($xPos+$xSize)<=$this->mWidth &&
      $yPos>=0 && $yPos<=$this->mHeight && ($yPos+$ySize)<=$this->mHeight) {
	    for ($i=0;$i<$xSize;$i++) {
		   ImageLine($this->mImg, $xPos+$i, $yPos, $xPos+$i, $yPos+$ySize, $this->mBrush);
		   }
		   return true;
		 }
     __DEBUG__("DrawSingleBar: Out of range");
	 return false;    
  }					  

function GetError() {  
  return $this->mError;
}					   

function GetFontHeight($font) {
 return ImageFontHeight($font);
}							   

function GetFontWidth($font)  {
 return ImageFontWidth($font);
}					  

function SetFont($font) {
 $this->mFont = $font;
}					  

function GetStyle () {
 return $this->mStyle;
}					  

function SetStyle ($Style) {
 __TRACE__("CHANGING STYLE");
 $this->mStyle = $Style;
}			  

function FlushObject () {
 if (($this->mStyle & BCS_BORDER)) {
       $this->DrawBorder();
    }				       
   if ($this->mStyle & BCS_IMAGE_PNG) {
     Header("Content-Type: image/png");
     ImagePng($this->mImg);
   } else if ($this->mStyle & BCS_IMAGE_JPEG) {
     		Header("Content-Type: image/jpeg");
		    ImageJpeg($this->mImg);
   		} else __DEBUG__("FlushObject: No output type");
 }											

 function DestroyObject () {
   ImageDestroy($obj->mImg);
 }

}

Everything this I put inside of a loop "for", through one include. Therefore a program is part that generates boletos of bank inside the diverse customers of an interval of dates. E the stretch above mentions part to it of the routine that prints the bar code.

[deimosaffair]

"Everything this I put inside of a loop "for", through one include. "

check what i said. You CAN'T have includes or requires inside loops. the best place for includes are right at the top of the script.