phpMakeThumbnailFile ( origFile ; newFile ; newWidth ; newHeight )

Create a thumbnail file

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Mark DeNyse - Show more from this author
Driftwood Interactive
http://DriftwoodInteractive.com

Sample input:

phpMakeThumbnailFile("picture1.jpg"; "picture1tn.jpg"; 160; 120)

Sample output:

0 if success, < 0 if there's an error

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

//
// phpMakeThumbnailFile(origFile, newFile, newWidth, newHeight)
//
// Create a new image file from an exsting file with the specified dimensions.
//
// Returns:
//        0  Success
//        -1  Image is not a GIF, JPG, or PNG
//        -2  Couldn't copy the image
Let (
  [
    $origFile = origFile;
    $newFile = newFile;
    $newWidth = newWidth;
    $newHeight = newHeight;

    phpCode = "error_reporting(0); //(E_ALL & ~E_NOTICE);¶
    ¶
    echo MakeThumbnailFile(fm_evaluate('$origFile'), fm_evaluate('$newFile'), fm_evaluate('$newWidth'), fm_evaluate('$newHeight'));¶
    ¶
    ¶
    function MakeThumbnailFile($origFile, $newFile, $newWidth, $newHeight)¶
    {¶
      $imageInfo = getimagesize($origFile);¶
      $srcImg = '';¶
      if ($imageInfo[2] == IMG_JPG) $srcImg = @imagecreatefromjpeg($origFile);¶
      if ($imageInfo[2] == IMG_PNG) $srcImg = @imagecreatefrompng($origFile);¶
      if ($imageInfo[2] == IMG_GIF) $srcImg = @imagecreatefromgif($origFile);¶
      if ($srcImg == '')¶
        return -1;¶
      else¶
      {¶
        ¶
        $oldWidth = imageSX($srcImg);¶
        $oldHeight = imageSY($srcImg);¶
        ¶
        if (($oldWidth == $newWidth) && ($oldHeight == $newHeight))¶
        {¶
          $theWidth = $newWidth;¶
          $theHeight = $newHeight;¶
        }¶
        else if ($oldWidth > $oldHeight)¶
        {¶
          $theWidth = $newWidth;¶
          $theHeight = $oldHeight * ($newWidth / $oldWidth);¶
        }¶
        else if ($oldWidth < $oldHeight)¶
        {¶
          $theWidth = $oldWidth * ($newWidth / $oldHeight);¶
          $theHeight = $newWidth;¶
        }¶
        else if ($oldWidth == $oldHeight)¶
        {¶
          $theWidth = $newWidth;¶
          $theHeight = $newHeight;¶
        }¶
        ¶
        $dstImg = ImageCreateTrueColor($theWidth, $theHeight);¶
        $didCopy = imagecopyresampled($dstImg, $srcImg, 0, 0, 0, 0, $theWidth, $theHeight, $oldWidth, $oldHeight);¶
        ¶
        if ($didCopy)¶
        {¶
          if ($imageInfo[2] == IMG_JPG) $didCopy = imagejpeg($dstImg, $newFile, 100);¶
          if ($imageInfo[2] == IMG_PNG) $didCopy = imagepng($dstImg, $newFile);¶
          if ($imageInfo[2] == IMG_GIF) $didCopy = imagegif($dstImg, $newFile);¶
        }
        ¶
        imagedestroy($dstImg);¶
        imagedestroy($srcImg);¶
        ¶
        return $didCopy ? 0 : -2;¶
      }¶
    }¶
    "
  ] ;
  PHP_Execute(phpCode)
)

Creates a thumbnail image file given an image file. The resulting image file can be of a larger size, but typically this function is used to create small thumbnail pictures of larger ones.

Requires the SmartPill PHP plug-in from Scodigo.

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

phpMakeThumbnailFile ( origFile ; newFile ; newWidth ; newHeight )

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