Convert .ai, .psd, .jpg, .png, .gif into thumbnails

make_thumbs.php

<?php 

/**
 * Convert
 * http://stackoverflow.com/questions/12516842/convert-psd-and-ai-to-png-jpg-with-imagick
 * @param string $dir Directory to save to.
 * @param string $tmpName The name to name the file excluding the extension.
 * @param string $fileType
 * @param string $size Large or small.
 */
function thumbGenerator($dir,$tmpName,$fileType,$size){
    $saveFileType = "png";
    $imagePath = $dir.$tmpName.".".$fileType;
    $image = new Imagick();
    $image->readimage($imagePath);
    if($fileType == "psd"){
        $image->setIteratorIndex(0);
        // Comment from StackOverflow:
        // doesn't work for multilayer psd files
        // but $image->setImageIndex(0) instead of $image->setIteratorIndex(0) does the work
    }
    $dimensions = $image->getImageGeometry();
    $width = $dimensions['width'];
    $height = $dimensions['height'];
    if($size == "large"){
        $maxWidth = 720;
        $maxHeight =720;
    }
    if($size == "small"){
        $maxWidth = 250;
        $maxHeight =250;
    }
    if($height > $width){
        //Portrait
        if($height > $maxHeight)
            $image->thumbnailImage(0, $maxHeight);
            $dimensions = $image->getImageGeometry();
            if($dimensions['width'] > $maxWidth){
                $image->thumbnailImage($maxWidth, 0);
            }
    }elseif($height < $width){
        //Landscape
        $image->thumbnailImage($maxWidth, 0);
    }else{
        //square
        $image->thumbnailImage($maxWidth, 0);
    }
    if($size == "large"){
        $image->writeImage($dir . $tmpName."-lg.".$saveFileType);
    }
    if($size == "small"){
        $image->writeImage($dir . $tmpName."-sm.".$saveFileType);;
    }
}


/*
Other resources:

* http://phpflush.blogspot.com/2011/02/create-thumbnail-image-of-jpg-jpeg-png.html (not sure if it works?)

* http://www.multipole.org/discourse-server/viewtopic.php?f=1&t=18679
    Using imagemagick:
    convert 22495.psd -background white -flatten -density 300 -colors 512 -antialias  -normalize \
        -units PixelsPerInch -quality 100 -colorspace RGB -resize '3425x3425>'  slozka/22495.jpg

* http://www.rubblewebs.co.uk/imagemagick/psd.php
*/