Set up the class.
Now we need to set up some variables to be used throughout the program.
The variables above will be explained once we use them. Now we
need to create the first function. This function will get the image we
are going to crop, work out its dimension and then use them dimensions
to work out how we are going to crop it.
$this->imgSrc = $image;
//getting the image dimensions
list($width, $height) = getimagesize($this->imgSrc);
//create image from the jpeg
this->myImage = imagecreatefromjpeg($this->imgSrc) or die("Error: Cannot find image!");
if($width > $height) $biggestSide = $width; //find biggest length
else $biggestSide = $height;
//The crop size will be half that of the largest side
$cropPercent = .5; // This will zoom in to 50% zoom (crop)
$this->cropWidth = $biggestSide*$cropPercent;
$this->cropHeight = $biggestSide*$cropPercent;
//getting the top left coordinate
$this->x = ($width-$this->cropWidth)/2;
$this->y = ($height-$this->cropHeight)/2;
Now we actually need to start creating the actual cropped image.
$thumbSize = 250; // will create a 250 x 250 thumb
$this->thumb = imagecreatetruecolor($thumbSize, $thumbSize);
imagecopyresampled($this->thumb, $this->myImage, 0, 0,$this->x, $this->y, $thumbSize, $thumbSize, $this->cropWidth, $this->cropHeight);
Now all we need to do is render the image out.
Now we just need to create the instance
$image = new cropImage;
You can use this script to display a thumb of images on a new page, by using the following page.
<img src="thumbcreate.php?src=images/largimg.jpg"> //link to large image