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PHP - Using Imagecopy From A Resized Image. Let Me Explain...

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Using Imagecopy From A Resized Image. Let Me Explain...	View Content

Hi,

I have the following code

$w=$_GET['w'];
$h=isset($_GET['h'])?$_GET['h']:$w;
$x=isset($_GET['x'])?$_GET['x']:0;
$y=isset($_GET['y'])?$_GET['y']:0;
$filename=$_GET['src'];
header('Content-type: image/jpg');
header('Content-Disposition: attachment; filename='.$src);
$image = imagecreatefromjpeg($filename);
$crop = imagecreatetruecolor($w,$h);
imagecopy ( $crop, $image, 0, 0, $x, $y, $w, $h );
imagejpeg($crop);

And display it as such
<img src="crop.php?x=<?php echo $_GET['x1']; ?>&y=<?php echo $_GET['y1']; ?>&w=300&h=300&src=cropper/castle.jpg">

So say the image is 500 x 333, it crops out a 300x300 section of it from X and Y. Works fine.
BUT, when i resize the image to say 450 x 300, it obviously still crops it from the 500 x 333 version so it looks different to what it should do.
I need a way to be able to resize the image in the above PHP and then imagecopy from that.

Cant think of how that would be done, any ideas?

Thank you!

Full Excel VBA Course - Beginner to Expert

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hi everyone im new to php. I have been reading few books. im trying to build a image gallery. the first step is to upload a images. in the process of uploading, i want to resize the image then add watermark last insert into the database which is mysql, (i know about the dont insert image into database thing).

here is the form script

Code: [Select]

<?php
    require_once('globals.php');
?>
<html>
<head>
<title>Upload an Image</title>
</head>
<body>
<div>
<h1>Upload an Image</h1>

<p>
<a href="./">View uploaded images</a>
</p>

<form method="post" action="process.php" enctype="multipart/form-data">
<div>
<input type="file" name="image" />
<input type="submit" value="Upload Image" />
</div>
</form>
</div>



</body>
</html>

here is the watermark script

Code: [Select]

<?php
    require_once('globals.php');
?>
<html>
<head>
<title>Upload an Image</title>
</head>
<body>
<div>
<h1>Upload an Image</h1>

<p>
<a href="./">View uploaded images</a>
</p>

<form method="post" action="process.php" enctype="multipart/form-data">
<div>
<input type="file" name="image" />
<input type="submit" value="Upload Image" />
</div>
</form>
</div>



</body>
</html>

here is my resize script

Code: [Select]

<?php

   # ========================================================================#
   #
   #  Author:    Jarrod Oberto
   #  Version: 1.0
   #  Date:      17-Jan-10
   #  Purpose:   Resizes and saves image
   #  Requires : Requires PHP5, GD library.
   #  Usage Example:
   #                     include("classes/resize_class.php");
   #                     $resizeObj = new resize('images/cars/large/input.jpg');
   #                     $resizeObj -> resizeImage(150, 100, 0);
   #                     $resizeObj -> saveImage('images/cars/large/output.jpg', 100);
   #
   #
   # ========================================================================#

Class resize
{
// *** Class variables
private $image;
    private $width;
    private $height;
private $imageResized;

function __construct($fileName)
{
// *** Open up the file
$this->image = $this->openImage($fileName);

    // *** Get width and height
    $this->width  = imagesx($this->image);
    $this->height = imagesy($this->image);
}

## --------------------------------------------------------

private function openImage($file)
{
// *** Get extension
$extension = strtolower(strrchr($file, '.'));

switch($extension)
{
case '.jpg':
case '.jpeg':
$img = @imagecreatefromjpeg($file);
break;
case '.gif':
$img = @imagecreatefromgif($file);
break;
case '.png':
$img = @imagecreatefrompng($file);
break;
default:
$img = false;
break;
}
return $img;
}

## --------------------------------------------------------

public function resizeImage($newWidth, $newHeight, $option="auto")
{
// *** Get optimal width and height - based on $option
$optionArray = $this->getDimensions($newWidth, $newHeight, $option);

$optimalWidth  = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];

// *** Resample - create image canvas of x, y size
$this->imageResized = imagecreatetruecolor($optimalWidth, $optimalHeight);
imagecopyresampled($this->imageResized, $this->image, 0, 0, 0, 0, $optimalWidth, $optimalHeight, $this->width, $this->height);

// *** if option is 'crop', then crop too
if ($option == 'crop') {
$this->crop($optimalWidth, $optimalHeight, $newWidth, $newHeight);
}
}

## --------------------------------------------------------

private function getDimensions($newWidth, $newHeight, $option)
{

   switch ($option)
{
case 'exact':
$optimalWidth = $newWidth;
$optimalHeight= $newHeight;
break;
case 'portrait':
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
break;
case 'landscape':
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
break;
case 'auto':
$optionArray = $this->getSizeByAuto($newWidth, $newHeight);
$optimalWidth = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];
break;
case 'crop':
$optionArray = $this->getOptimalCrop($newWidth, $newHeight);
$optimalWidth = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];
break;
}
return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
}

## --------------------------------------------------------

private function getSizeByFixedHeight($newHeight)
{
$ratio = $this->width / $this->height;
$newWidth = $newHeight * $ratio;
return $newWidth;
}

private function getSizeByFixedWidth($newWidth)
{
$ratio = $this->height / $this->width;
$newHeight = $newWidth * $ratio;
return $newHeight;
}

private function getSizeByAuto($newWidth, $newHeight)
{
if ($this->height < $this->width)
// *** Image to be resized is wider (landscape)
{
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
}
elseif ($this->height > $this->width)
// *** Image to be resized is taller (portrait)
{
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
}
else
// *** Image to be resizerd is a square
{
if ($newHeight < $newWidth) {
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
} else if ($newHeight > $newWidth) {
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
} else {
// *** Sqaure being resized to a square
$optimalWidth = $newWidth;
$optimalHeight= $newHeight;
}
}

return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
}

## --------------------------------------------------------

private function getOptimalCrop($newWidth, $newHeight)
{

$heightRatio = $this->height / $newHeight;
$widthRatio  = $this->width /  $newWidth;

if ($heightRatio < $widthRatio) {
$optimalRatio = $heightRatio;
} else {
$optimalRatio = $widthRatio;
}

$optimalHeight = $this->height / $optimalRatio;
$optimalWidth  = $this->width  / $optimalRatio;

return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
}

## --------------------------------------------------------

private function crop($optimalWidth, $optimalHeight, $newWidth, $newHeight)
{
// *** Find center - this will be used for the crop
$cropStartX = ( $optimalWidth / 2) - ( $newWidth /2 );
$cropStartY = ( $optimalHeight/ 2) - ( $newHeight/2 );

$crop = $this->imageResized;
//imagedestroy($this->imageResized);

// *** Now crop from center to exact requested size
$this->imageResized = imagecreatetruecolor($newWidth , $newHeight);
imagecopyresampled($this->imageResized, $crop , 0, 0, $cropStartX, $cropStartY, $newWidth, $newHeight , $newWidth, $newHeight);
}

## --------------------------------------------------------

public function saveImage($savePath, $imageQuality="100")
{
// *** Get extension
         $extension = strrchr($savePath, '.');
        $extension = strtolower($extension);

switch($extension)
{
case '.jpg':
case '.jpeg':
if (imagetypes() & IMG_JPG) {
imagejpeg($this->imageResized, $savePath, $imageQuality);
}
break;

case '.gif':
if (imagetypes() & IMG_GIF) {
imagegif($this->imageResized, $savePath);
}
break;

case '.png':
// *** Scale quality from 0-100 to 0-9
$scaleQuality = round(($imageQuality/100) * 9);

// *** Invert quality setting as 0 is best, not 9
$invertScaleQuality = 9 - $scaleQuality;

if (imagetypes() & IMG_PNG) {
imagepng($this->imageResized, $savePath, $invertScaleQuality);
}
break;

// ... etc

default:
// *** No extension - No save.
break;
}

imagedestroy($this->imageResized);
}

## --------------------------------------------------------

}
?>

here is the insert database script

Code: [Select]

<?php
    require_once('globals.php');

    function assertValidUpload($code)
    {
        if ($code == UPLOAD_ERR_OK) {
            return;
        }

        switch ($code) {
            case UPLOAD_ERR_INI_SIZE:
            case UPLOAD_ERR_FORM_SIZE:
                $msg = 'Image is too large';
                break;

            case UPLOAD_ERR_PARTIAL:
                $msg = 'Image was only partially uploaded';
                break;

            case UPLOAD_ERR_NO_FILE:
                $msg = 'No image was uploaded';
                break;

            case UPLOAD_ERR_NO_TMP_DIR:
                $msg = 'Upload folder not found';
                break;

            case UPLOAD_ERR_CANT_WRITE:
                $msg = 'Unable to write uploaded file';
                break;

            case UPLOAD_ERR_EXTENSION:
                $msg = 'Upload failed due to extension';
                break;

            default:
                $msg = 'Unknown error';
        }

        throw new Exception($msg);
    }

    $errors = array();

    try {
        if (!array_key_exists('image', $_FILES)) {
            throw new Exception('Image not found in uploaded data');
        }

        $image = $_FILES['image'];

        // ensure the file was successfully uploaded
        assertValidUpload($image['error']);

        if (!is_uploaded_file($image['tmp_name'])) {
            throw new Exception('File is not an uploaded file');
        }

        $info = getImageSize($image['tmp_name']);

        if (!$info) {
            throw new Exception('File is not an image');
        }
    }
    catch (Exception $ex) {
        $errors[] = $ex->getMessage();
    }

    if (count($errors) == 0) {
        // no errors, so insert the image

        $query = sprintf(
            "insert into images (filename, mime_type, file_size, file_data)
                values ('%s', '%s', %d, '%s')",
            mysql_real_escape_string($image['name']),
            mysql_real_escape_string($info['mime']),
            $image['size'],
            mysql_real_escape_string(
                file_get_contents($image['tmp_name'])
            )
        );

        mysql_query($query, $db);

        $id = (int) mysql_insert_id($db);

        // finally, redirect the user to view the new image
        header('Location: view.php?id=' . $id);
        exit;
    }
?>
<html>
<head>
<title>Error</title>
</head>
<body>
<div>
<p>
The following errors occurred:
</p>

<ul>
<?php foreach ($errors as $error) { ?>
<li>
<?php echo htmlSpecialChars($error) ?>
</li>
<?php } ?>
</ul>

<p>
<a href="upload.php">Try again</a>
</p>
</div>
</body>
</html>

here is my view script

Code: [Select]

<?php
    require_once('globals.php');

    try {
        if (!isset($_GET['id'])) {
            throw new Exception('ID not specified');
        }

        $id = (int) $_GET['id'];

        if ($id <= 0) {
            throw new Exception('Invalid ID specified');
        }

        $query  = sprintf('select * from images where image_id = %d', $id);
        $result = mysql_query($query, $db);

        if (mysql_num_rows($result) == 0) {
            throw new Exception('Image with specified ID not found');
        }

        $image = mysql_fetch_array($result);
    }
    catch (Exception $ex) {
        header('HTTP/1.0 404 Not Found');
        exit;
    }

    header('Content-type: ' . $image['mime_type']);
    header('Content-length: ' . $image['file_size']);

    echo $image['file_data'];
?>

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any clues i appreciatte

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Code: [Select]
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Code: [Select]
$xmlDoc = new DOMDocument();
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Code: [Select]
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{
$recordOptions .= "<option value=\"{$row['id']}\">";
$recordOptions .= " {$row['firstname']} {$row['lastname']}, {$row['gender']}, {$row['dob']}";
$recordOptions .= "</option>\n";
}
}

?>
<html>
<body>

<?php echo $confirmMsg; ?><br />

<form action ='' method='post'>

Somone Explain This Code?

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Code: [Select]
if ($r['parent_id'] > 0)
{
$this->children[ $r['parent_id'] ][$r['id']] = $r;
}
else
{
$this->forums[ $r['id'] ] = $r;
}
what is this code doing?

i don't get it how it uses the 2 variables in the " [ " " ] " 's ? weird?

$r is a simple select * from a query..

i dont get the 2 variables with [] right next to each other?

Moved: Can Anyone Explain In Plain English What The <div> Tag Is Used For Mainly?

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This topic has been moved to HTML Help.

http://www.phpfreaks.com/forums/index.php?topic=331697.0

Loading Only Sections Of A Page? (not Sure How To Explain...)

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This should be an easy one but I'm looking for a bit of help.

I'm using a php framework and using includes to bring different pieces of a website togethor onto the page.
The top of the page uses a flash banner, then there are some simple text sections below.

The banner is in it's own php file as well.

Wondering if it's possible to have the banner NOT replay after each page load? I'm not sure if this is something I need to setup in the flash file, or if there is a way to do it in the php files?

Basically, the banner is the same for all of the pages, and I want it (once loaded) to stay on the page while the details on the bottom change, WITHOUT going through the entire animation again. Make sense?

here's the page as it stands now so you can get a better idea what I'm trying to do.

http://www.getmoreimpact.com/index.php

again not sure if this needs to be done in the flash side, or the php? Any ideas are better than what I've got!

Thanks in advance

Can Someone Explain The Parentheses Structure For Negation Operators

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Can someone help me understand parentheses structure?

Why here does the second empty() have no parentheses before it and an extra parentheses at the end?

if (empty($subject) && empty($text)) {
....

And here, why is there an extra parentheses at the end?

if (empty($subject) && (!empty($text))) {
...

And here, why double parentheses in the 1st empty() and none before the 2nd empty() ?

if ((!empty($subject)) && empty($text)) {
...

Thank You!

michael