Resize an Image proportionally

Discussion in 'Programming' started by MajHate, Nov 2, 2008.

0
  1. #1
    Hello,

    I am trying to resize an image proportionally. I want the width to be 300 and the height to be proportional and then upload it onto my website. I found a script to resize it, however i still have problems uploading it to my site because the script was made to just save the image after you resize it. I have posted the script I found below.

    Thanks,
    Jason


    <?php
    if($_SERVER['REQUEST_METHOD'] == 'POST') {
        if($_FILES['image']) {
            preg_match('/\.([A-Za-z]+?)$/', $_FILES['image']['name'], $matches);
            $matches[1] = strtolower($matches[1]);
            if($matches[1] == 'png' && function_exists('imagecreatefrompng') || $matches[1] == 'jpg' && function_exists('imagecreatefromjpeg') || $matches[1] == 'jpeg' && function_exists('imagecreatefromjpeg') || $matches[1] == 'gif' && function_exists('imagecreatefromgif')  || $matches[1] == 'bmp' && function_exists('imagecreatefromwbmp')) {
                list($owidth, $oheight) = getimagesize($_FILES['image']['tmp_name']);
                if($_POST['resizeby'] == 'height') {
                    $nheight = ($_POST['size']>1)?$_POST['size']:600;
                    $nwidth = $nheight / $oheight * $owidth;
                    $resized = imagecreatetruecolor($nwidth, $nheight);
                }
                else {
                    $nwidth = ($_POST['size']>1)?$_POST['size']:800;
                    $nheight = $nwidth / $owidth * $oheight;
                    $resized = imagecreatetruecolor($nwidth, $nheight);
                }
                if($matches[1] == 'png')
                    $original = imagecreatefrompng($_FILES['image']['tmp_name']);
                if($matches[1] == 'jpg' || $matches[1] == 'jpeg')




                    $original = imagecreatefromjpeg($_FILES['image']['tmp_name']);
                if($matches[1] == 'gif')
                    $original = imagecreatefromgif($_FILES['image']['tmp_name']);
                if($matches[1] == 'bmp')
                    $original = imagecreatefromwbmp($_FILES['image']['tmp_name']);

                imagecopyresampled($resized, $original, 0, 0, 0, 0, $nwidth, $nheight, $owidth, $oheight);

                header('Content-Disposition: attachment; filename="'.$_FILES['image']['name'].'"');
                header('Content-type: image/'.(($matches[1] == 'jpg')?'jpeg':$matches[1]));

                if($matches[1] == 'png')
                    imagepng($resized);
                if($matches[1] == 'jpg' || $matches[1] == 'jpeg')
                    imagejpeg($resized);
                if($matches[1] == 'gif')
                    imagegif($resized);
                if($matches[1] == 'bmpg')
                    imagewbmp($resized);
                exit();
                
            } else
                $error = 'File type not supported!';
        } else
            $error = 'No image uploaded!';
    }
?>

  <head>
    <title>Resize Image</title>

  </head>
  <body>
    <h1>Resize Image</h1>
    <?php 
        if($error)
            print '<p>'.$error.'</p>';
    ?>
    <form action="" method="post" enctype="multipart/form-data" >
        <p>Upload your JPG, JPEG, GIF, PNG or BMP image: <br />
            <input type="file" name="image" /></p>
        <p>Choose a height or width you want your image to be: <br />
            <select name="resizeby">
                <option value="width" selected="true">Width:</option>
                <option value="height">Height:</option>
            </select>
            <input type="text" name="size" id="size" value="800" /> pixels</p>
        <p><input type="submit" value="Submit" id="submit" /></p>
    </form>
  </body>
</html>
    Code (markup):
     
    MajHate, Nov 2, 2008 IP
  2. happpy

    happpy Well-Known Member

    Messages:
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    #2
    i changed it for you to get the idea.

    <?php
$dir="./tmp";
$fname=$_FILES[image][name];
$fileout="$dir/$fname";
    if($_SERVER['REQUEST_METHOD'] == 'POST') {
        if($_FILES['image']) {
            preg_match('/\.([A-Za-z]+?)$/', $_FILES['image']['name'], $matches);
            $matches[1] = strtolower($matches[1]);
            if($matches[1] == 'png' && function_exists('imagecreatefrompng') || $matches[1] == 'jpg' && function_exists('imagecreatefromjpeg') || $matches[1] == 'jpeg' && function_exists('imagecreatefromjpeg') || $matches[1] == 'gif' && function_exists('imagecreatefromgif')  || $matches[1] == 'bmp' && function_exists('imagecreatefromwbmp')) {
                list($owidth, $oheight) = getimagesize($_FILES['image']['tmp_name']);
                if($_POST['resizeby'] == 'height') {
                    $nheight = ($_POST['size']>1)?$_POST['size']:600;
                    $nwidth = $nheight / $oheight * $owidth;
                    $resized = imagecreatetruecolor($nwidth, $nheight);
                }
                else {
                    $nwidth = ($_POST['size']>1)?$_POST['size']:800;
                    $nheight = $nwidth / $owidth * $oheight;
                    $resized = imagecreatetruecolor($nwidth, $nheight);
                }
                if($matches[1] == 'png')
                    $original = imagecreatefrompng($_FILES['image']['tmp_name']);
                if($matches[1] == 'jpg' || $matches[1] == 'jpeg')




                    $original = imagecreatefromjpeg($_FILES['image']['tmp_name']);
                if($matches[1] == 'gif')
                    $original = imagecreatefromgif($_FILES['image']['tmp_name']);
                if($matches[1] == 'bmp')
                    $original = imagecreatefromwbmp($_FILES['image']['tmp_name']);

                imagecopyresampled($resized, $original, 0, 0, 0, 0, $nwidth, $nheight, $owidth, $oheight);


                if($matches[1] == 'png')
                    imagepng($resized,$fileout);
                if($matches[1] == 'jpg' || $matches[1] == 'jpeg')
                    imagejpeg($resized,$fileout);
                if($matches[1] == 'gif')
                    imagegif($resized,$fileout);
                if($matches[1] == 'bmpg')
                    imagewbmp($resized,$fileout);
echo"saved as $fileout";
                exit();
                
            } else
                $error = 'File type not supported!';
        } else
            $error = 'No image uploaded!';
    }
?>

  <head>
    <title>Resize Image</title>

  </head>
  <body>
    <h1>Resize Image</h1>
    <?php 
        if($error)
            print '<p>'.$error.'</p>';
    ?>
    <form action="" method="post" enctype="multipart/form-data" >
        <p>Upload your JPG, JPEG, GIF, PNG or BMP image: <br />
            <input type="file" name="image" /></p>
        <p>Choose a height or width you want your image to be: <br />
            <select name="resizeby">
                <option value="width" selected="true">Width:</option>
                <option value="height">Height:</option>
            </select>
            <input type="text" name="size" id="size" value="800" /> pixels</p>
        <p><input type="submit" value="Submit" id="submit" /></p>
    </form>
  </body>
</html>
    Code (markup):
     
    happpy, Nov 3, 2008 IP