changing a form into a function....

mrheff · March 5, 2007

so say i have a form, which does one of those actions like $Server_SElf, y know what i mean, is it then possible for me to strip out the form elements completely and just send variables to it, have it do its magic and then redierect to a success/failed miserably page?

For an example i want to change a form that does stuff similar to this

<a href="http://koivi.com/php-gd-image-watermark/">someones uploaded script</a>

into a function i will include into series of actions, (send to dir's, watermark according to Portrait/landscape) etc

Anyway if someone could point me in the right direction that would be fresh like a vegetable, heff.

monk.e.boy · March 5, 2007

What exactly is your question?

Please post some code.

monk.e.boy

mrheff · March 5, 2007

sorry if i was not that clear....

... id like to change this form 'ere,

into a page that i can send to from a different form now is this is a case of just sending the variable into this form or do i need to edit out all the form input bits?,.

The next problem being i would like to watermark on a for each $file, so as i might do batch watermarks.

The link in my previous mail is where i got this script from so as you can see it working.

thanks alot, heff.

<?php
    ob_start();

    $disp_width_max=150;                    // used when displaying watermark choices
    $disp_height_max=80;                    // used when displaying watermark choices
    $edgePadding=0;                        // used when placing the watermark near an edge
    $quality=100;                           // used when generating the final image
    $default_watermark='carbontall.png';  // the default image to use if no watermark was chosen
    
    if(isset($_POST['process'])){
        // an image has been posted, let's get to the nitty-gritty
        if(isset($_FILES['watermarkee']) && $_FILES['watermarkee']['error']==0){
        
            // be sure that the other options we need have some kind of value
            if(!isset($_POST['save_as'])) $_POST['save_as']='jpeg';
            if(!isset($_POST['v_position'])) $_POST['v_position']='bottom';
            if(!isset($_POST['h_position'])) $_POST['h_position']='right';
            if(!isset($_POST['wm_size'])) $_POST['wm_size']='1';
            if(!isset($_POST['watermark'])) $_POST['']=$default_watermark;
        
            // file upload success
            $size=getimagesize($_FILES['watermarkee']['tmp_name']);
            if($size[2]==2 || $size[2]==3){
                // it was a JPEG or PNG image, so we're OK so far
                
                $original=$_FILES['watermarkee']['tmp_name'];
                $target_name=date('YmdHis').'_'.
                    // if you change this regex, be sure to change it in generated-images.php:26
                    preg_replace('`[^a-z0-9-_.]`i','',$_FILES['watermarkee']['name']);
                $target=dirname(__FILE__).'/results/'.$target_name;
                $watermark=dirname(__FILE__).'/watermarks/'.$_POST['watermark'];
                $wmTarget=$watermark.'.tmp';

                $origInfo = getimagesize($original); 
                $origWidth = $origInfo[0]; 
                $origHeight = $origInfo[1]; 

                $waterMarkInfo = getimagesize($watermark);
                $waterMarkWidth = $waterMarkInfo[0];
                $waterMarkHeight = $waterMarkInfo[1];
        
                // watermark sizing info
                if($_POST['wm_size']=='larger'){
                    $placementX=0;
                    $placementY=0;
                    $_POST['h_position']='center';
                    $_POST['v_position']='center';
                	$waterMarkDestWidth=$waterMarkWidth;
                	$waterMarkDestHeight=$waterMarkHeight;
                    
                    // both of the watermark dimensions need to be 5% more than the original image...
                    // adjust width first.
                    if($waterMarkWidth > $origWidth*1.05 && $waterMarkHeight > $origHeight*1.05){
                    	// both are already larger than the original by at least 5%...
                    	// we need to make the watermark *smaller* for this one.
                    	
                    	// where is the largest difference?
                    	$wdiff=$waterMarkDestWidth - $origWidth;
                    	$hdiff=$waterMarkDestHeight - $origHeight;
                    	if($wdiff > $hdiff){
                    		// the width has the largest difference - get percentage
                    		$sizer=($wdiff/$waterMarkDestWidth)-0.05;
                    	}else{
                    		$sizer=($hdiff/$waterMarkDestHeight)-0.05;
                    	}
                    	$waterMarkDestWidth-=$waterMarkDestWidth * $sizer;
                    	$waterMarkDestHeight-=$waterMarkDestHeight * $sizer;
                    }else{
                    	// the watermark will need to be enlarged for this one
                    	
                    	// where is the largest difference?
                    	$wdiff=$origWidth - $waterMarkDestWidth;
                    	$hdiff=$origHeight - $waterMarkDestHeight;
                    	if($wdiff > $hdiff){
                    		// the width has the largest difference - get percentage
                    		$sizer=($wdiff/$waterMarkDestWidth)+0.05;
                    	}else{
                    		$sizer=($hdiff/$waterMarkDestHeight)+0.05;
                    	}
                    	$waterMarkDestWidth+=$waterMarkDestWidth * $sizer;
                    	$waterMarkDestHeight+=$waterMarkDestHeight * $sizer;
                    }
                }else{
                $waterMarkDestWidth=round($origWidth * floatval($_POST['wm_size']));
                $waterMarkDestHeight=round($origHeight * floatval($_POST['wm_size']));
                if($_POST['wm_size']==1){
                    $waterMarkDestWidth-=2*$edgePadding;
                    $waterMarkDestHeight-=2*$edgePadding;
                }
                }

                // OK, we have what size we want the watermark to be, time to scale the watermark image
                resize_png_image($watermark,$waterMarkDestWidth,$waterMarkDestHeight,$wmTarget);
                
                // get the size info for this watermark.
                $wmInfo=getimagesize($wmTarget);
                $waterMarkDestWidth=$wmInfo[0];
                $waterMarkDestHeight=$wmInfo[1];

                $differenceX = $origWidth - $waterMarkDestWidth;
                $differenceY = $origHeight - $waterMarkDestHeight;

                // where to place the watermark?
                switch($_POST['h_position']){
                    // find the X coord for placement
                    case 'left':
                        $placementX = $edgePadding;
                        break;
                    case 'center':
                        $placementX =  round($differenceX / 2);
                        break;
                    case 'right':
                        $placementX = $origWidth - $waterMarkDestWidth - $edgePadding;
                        break;
                }

                switch($_POST['v_position']){
                    // find the Y coord for placement
                    case 'top':
                        $placementY = $edgePadding;
                        break;
                    case 'center':
                        $placementY =  round($differenceY / 2);
                        break;
                    case 'bottom':
                        $placementY = $origHeight - $waterMarkDestHeight - $edgePadding;
                        break;
                }
       
                if($size[2]==3)
                    $resultImage = imagecreatefrompng($original);
                else
                    $resultImage = imagecreatefromjpeg($original);
                imagealphablending($resultImage, TRUE);
        
                $finalWaterMarkImage = imagecreatefrompng($wmTarget);
                $finalWaterMarkWidth = imagesx($finalWaterMarkImage);
                $finalWaterMarkHeight = imagesy($finalWaterMarkImage);
        
                imagecopy($resultImage,
                          $finalWaterMarkImage,
                          $placementX,
                          $placementY,
                          0,
                          0,
                          $finalWaterMarkWidth,
                          $finalWaterMarkHeight
                );
                
                if($size[2]==3){
                    imagealphablending($resultImage,FALSE);
                    imagesavealpha($resultImage,TRUE);
                    imagepng($resultImage,$target,$quality);
                }else{
                    imagejpeg($resultImage,$target,$quality); 
                }

                imagedestroy($resultImage);
                imagedestroy($finalWaterMarkImage);

                // display resulting image for download
?>
   <div>
    <h1>Watermarked Image</h1>
    <p>
     <a href="<?php echo $_SERVER['PHP_SELF'] ?>">Back To Form</a> <a href="generated-images.php">View Previously Watermarked Images</a>
    </p>
    <p>
     Below is the resulting watermarked image based on your input on the submission form. To save the image, right-click
     (control click on a Mac) and select the option similar to "Save Image As..." You can then save the image to your harddrive
     when prompted for a save location.
    </p>
    <p>
     Watermarked images are also saved on this system. You can view and/or delete watermarked images
     <a href="generated-images.php">here</a>.
    </p>
    <p align="center">
     <img src="results/<?php echo $target_name ?>?id=<?php echo md5(time()) ?>" alt="" />
    </p>
    <hr>
   </div>
<?php
                unlink($wmTarget);
            }else{
?>
   <div>
    <h1>Watermarked Image</h1>
    <p class="errorMsg">The image uploaded was not a JPEG or PNG image.</p>
   </div>
<?php
            }
        }else{
?>
   <div>
    <h1>Watermarked Image</h1>
    <p class="errorMsg">Unable to upload the image to watermark.</p>
   </div>
<?php
        }
    }else{
        // no image posted, show form for options
?>
   <div>
    <h1>Watermark A JPEG or PNG Image</h1>
    <p>
     <a href="generated-images.php">View Previously Watermarked Images</a>
    </p>
    <p>
      please ensure png-24 for correct proccessing.
    </p>
    <form method="post" enctype="multipart/form-data" action="<?php echo $_SERVER['PHP_SELF'] ?>">
     <table cellpadding="2" cellspacing="0" border="0">
      <tr>
       <th width="50%">
        Image to WaterMark:
        <p>(72dpi, RGB JPEG/PNG)</p>
       </th>
       <td width="50%">
        <input type="file" name="watermarkee" />
       </td>
      </tr>
      <tr>
       <th valign="top">
        Choose Watermark:<br />
        <p>
         watermarks placed in directory.
        </p>
        
       </th>
       <td valign="top">
        <table cellpadding="2" cellspacing="0" border="0">
<?php
        $dir=dirname(__FILE__).'/watermarks';
        if (is_dir($dir)) {
            if ($dh = opendir($dir)) {
                $i=0;
                $watermarks=array();
                while (($file = readdir($dh)) !== FALSE) {
                    if(!preg_match('`\.png$`',$file)) continue;
                    $watermarks[]=$file;
                }
                closedir($dh);
                
                // now sort the array according to file name
                asort($watermarks);
                
                foreach($watermarks as $file){
                    // restrain display width
                    $size=getimagesize($dir.'/'.$file);
                    if($size[0] > $disp_width_max && $disp_width_max){
                        $reduction=$disp_width_max / $size[0];
                        $size[0]=$size[0]*$reduction;
                        $size[1]=$size[1]*$reduction;
                        $size[3]=sprintf('width="%d" height="%d"',$size[0],$size[1]);
                        
                        // also restrain the height after a resize
                        if($size[1] > $disp_height_max && $disp_height_max){
                            $reduction=$disp_height_max / $size[1];
                            $size[0]=$size[0]*$reduction;
                            $size[1]=$size[1]*$reduction;
                            $size[3]=sprintf('width="%d" height="%d"',$size[0],$size[1]);
                        }
                    }

                    // also restrain the height
                    if($size[1] > $disp_height_max && $disp_height_max){
                        $reduction=$disp_height_max / $size[1];
                        $size[0]=$size[0]*$reduction;
                        $size[1]=$size[1]*$reduction;
                        $size[3]=sprintf('width="%d" height="%d"',$size[0],$size[1]);
                    }

                    echo '      <tr>',"\n",
                         '       <td>',"\n",
                         '        <input type="radio" value="',$file,'" name="watermark" /> ',
                         '<img src="watermarks/',$file,'" ',$size[3],' alt="" />',"\n",
                         '       </td>',"\n",
                         '      </tr>',"\n";

                    $i++;
                }
                if($i==0){
                    // no images at this time
                    echo '     <tr>',"\n",
                         '      <td>',"\n",
                         '       There are currently no watermark images to use with this the system on this server.',"\n",
                         '      </td>',"\n",
                         '     </tr>',"\n";
                }
            }
        }
?>
        </table>
       </td>
      </tr>
        <tr>
       <td align="center" colspan="2">
        <input type="submit" name="process" value="Watermark Image" />
       </td>
      </tr>
     </table>
    </form>
   </div>
<?php
    }
    $page_display=ob_get_clean();

function resize_png_image($img,$newWidth,$newHeight,$target){
    $srcImage=imagecreatefrompng($img);
    if($srcImage==''){
        return FALSE;
    }
    $srcWidth=imagesx($srcImage);
    $srcHeight=imagesy($srcImage);
    $percentage=(double)$newWidth/$srcWidth;
    $destHeight=round($srcHeight*$percentage)+1;
    $destWidth=round($srcWidth*$percentage)+1;
    if($destHeight > $newHeight){
        // if the width produces a height bigger than we want, calculate based on height
        $percentage=(double)$newHeight/$srcHeight;
        $destHeight=round($srcHeight*$percentage)+1;
        $destWidth=round($srcWidth*$percentage)+1;
    }
    $destImage=imagecreatetruecolor($destWidth-1,$destHeight-1);
    if(!imagealphablending($destImage,FALSE)){
        return FALSE;
    }
    if(!imagesavealpha($destImage,TRUE)){
        return FALSE;
    }
    if(!imagecopyresampled($destImage,$srcImage,0,0,0,0,$destWidth,$destHeight,$srcWidth,$srcHeight)){
        return FALSE;
    }
    if(!imagepng($destImage,$target)){
        return FALSE;
    }
    imagedestroy($destImage);
    imagedestroy($srcImage);
    return TRUE;
}

echo '<?xml version="1.0" encoding="iso-8859-1"?>',"\n"; ?>
<!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>
  <title>Watermarking JPEG and PNG Images with PHP and GD2</title>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
  <meta name="description" content="A PHP implementation to watermark JPEG or PNG images with a PNG-24 image with alpha transparency." />
  <style type="text/css">
       th{
        text-align: right;
        font-weight: bold;
    }
    th p{
        font-weight: normal;
        font-size: 75%;
        color: #c00;
        background-color: transparent;
    }
  </style>

</head>
<body>
    <div>
    <?php echo $page_display ?></div>
<div><h1><a href="batch.php">Batch Upload</a></h1>  

</div>
</body>
</html>

monk.e.boy · March 5, 2007

You want me to read all that!?

::) :

monk.e.boy

mrheff · March 5, 2007

well i need to give it all so you know what im on about.I only sent a link in the orginal so as youd know what i meant without havin to drag all the way through it.

in short i just want to know how to change it into something i can send to it from an external form not just itself, im still getting to grips with all this so i just want to know the possiblities and how i got about doing it, any ideas?

pleases....... beg beg beg beg.....

mrheff.

monk.e.boy · March 5, 2007

put the form processing stuff into a separate .php file.

Then you can put the URL of this new PHP page into the forms POST to URL.

change:

<form method="post" enctype="multipart/form-data" action="<?php echo $_SERVER['PHP_SELF'] ?>">

to:

<form method="post" enctype="multipart/form-data" action="my_form_processor.php">

Cutting up your current file will take a bit of testing. But it is quite easy.

monk.e.boy

mrheff · March 5, 2007

thanks man ill prolly hit back if i have anyprogress, One more thing mate when i am passing on variables using an url, eg

formprocessing.php?monkeytype=gorilla&money=0

do i have to extract the variable with a $_get type deal or does it just know what it is?

for example if i go one to use

<php

echo = 'you are sponsoring a ' $monkeytype'.';

?>

within the formprocessing.php document do i need to get the variable from the adress or will just reveal itself if ya know what i mean?

THANKS MAN, your a legend.

monk.e.boy · March 6, 2007

use:

<?php

if( isset( $_GET['monkey'] ) )
{
  $i = $_GET['monkey'];
}

?>

you may want to escape the $_GET to stop x-site scripting (I think)

monk.e.boy

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