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class.imageresizer.php
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<?php
/**
* @author: Hasan Shahriar
* @url: http://github.com/hsleonis
* Resize Bulk Images using GD Library
*/
class ImageResizer{
private $path;
private $height;
private $width;
private $img_dir;
private $thumb_dir;
private $compress;
private $is_crop_hard;
private $resize_list;
/**
* ImageResizer constructor.
* @param array $arr
*/
function __construct($arr=array()){
if(is_array($arr)) {
// Default value
$this->path = isset($arr['path'])? $arr['path'] : dirname(__FILE__).'/img';
$this->height = isset($arr['height'])? $arr['height'] : 200;
$this->width = isset($arr['width'])? $arr['width'] : 200;
$this->img_dir = isset($arr['img_dir'])? $arr['img_dir']: dirname(__FILE__).'/img';
$this->thumb_dir = isset($arr['thumb_dir'])? $arr['thumb_dir'].'/': dirname(__FILE__).'/thumb/';
$this->compress = isset($arr['compress'])? ($arr['compress']>=0 && $arr['compress']<=1)? $arr['compress']:1:0.8;
$this->is_crop_hard = isset($arr['is_crop_hard'])?(bool)$arr['is_crop_hard']:false;
$this->resize_list = isset($arr['resize_list'])?(bool)$arr['resize_list']:true;
}
else return false;
}
/**
* Create directory for images
*/
private function set_directory(){
if(!is_dir($this->img_dir)) mkdir($this->img_dir);
if(!is_dir($this->thumb_dir)) mkdir($this->thumb_dir);
}
/**
* Show output in HTML
*/
private function show_result_before() {
?>
<!DOCTYPE html>
<html>
<head>
<title>Image Resizer $ Shahriar</title>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
background: #FAFAFA;
}
.img-box{
margin: auto;
margin-top: 5vw;
width: 90%;
min-height: 90%;
padding: 50px;
display: table;
background: #FFF;
border: 1px dashed rgba(0,0,0,0.1);
border-radius: 2px;
}
.img-list {
list-style: decimal inside;
}
.img-list li {
border: 1px solid rgba(0,0,0,0.1);
border-radius: 2px;
padding: 10px 15px;
margin: 5px;
}
.msg-success {
color: #30AA30;
}
.msg-error {
color: #F25959;
}
</style>
</head>
<body>
<div class="img-box">
<ol class="img-list">
<?php
}
/**
* Show output in HTML
*/
private function show_result_after(){
?>
</ol>
</div>
</body>
</html>
<?php
}
/**
* Increase memory limit, execution time to work on lots of images
*/
private function set_env(){
ini_set("memory_limit", "256M");
ini_set("max_execution_time", 3000);
}
/**
* Check image type and parse data
* @param $path
* @return bool|resource
*/
private function image_data($path, $mime){
if (!strstr($mime, 'image/')) {
return false;
}
if($mime=='image/png'){ $src_img = imagecreatefrompng($path); }
else if($mime=='image/jpeg' or $mime=='image/jpg' or $mime=='image/pjpeg') {
$src_img = imagecreatefromjpeg($path);
}
else $src_img = false;
return $src_img;
}
/**
* Save new image to new_thumb_loc
* @param $dst_src
* @param $new_thumb_loc
* @param $mime
* @return bool
*/
private function save($dst_src, $new_thumb_loc, $mime){
if($mime=='image/png'){ $result = imagepng($dst_src,$new_thumb_loc,$this->compress*10); }
else if($mime=='image/jpeg' or $mime=='image/jpg' or $mime=='image/pjpeg') {
$result = imagejpeg($dst_src,$new_thumb_loc,$this->compress*100);
}
return $result;
}
/**
* Create thumbnail from larger image using GD library
*
* @param $imageName
* @param $newWidth
* @param $newHeight
* @return bool
*/
public function createThumbnail($imageName,$newWidth,$newHeight) {
$path = $this->img_dir . '/' . $imageName;
$mime_info = getimagesize($path);
$mime = $mime_info['mime'];
$src_img = $this->image_data($path, $mime);
if($src_img===false) return false;
$old_w = imageSX($src_img);
$old_h = imageSY($src_img);
$source_aspect_ratio = $old_w / $old_h;
$desired_aspect_ratio = $newWidth / $newHeight;
if ($source_aspect_ratio > $desired_aspect_ratio) {
/*
* Triggered when source image is wider
*/
$thumb_h = $newHeight;
$thumb_w = ( int ) ($newHeight * $source_aspect_ratio);
} else {
/*
* Triggered otherwise (i.e. source image is similar or taller)
*/
$thumb_w = $newWidth;
$thumb_h = ( int ) ($newWidth / $source_aspect_ratio);
}
$dst_img = ImageCreateTrueColor($thumb_w,$thumb_h);
$color = imagecolorallocatealpha($dst_img, 0, 0, 0, 127);
imagefill($dst_img,0,0,$color);
imagesavealpha($dst_img, true);
imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $thumb_w, $thumb_h, $old_w, $old_h);
if($this->is_crop_hard) {
$x = ($thumb_w - $newWidth) / 2;
$y = ($thumb_h - $newHeight) / 2;
$tmp_img = imagecreatetruecolor($newWidth, $newHeight);
$color = imagecolorallocatealpha($tmp_img, 0, 0, 0, 127);
imagefill($tmp_img,0,0,$color);
imagesavealpha($tmp_img, true);
imagecopy($tmp_img, $dst_img, 0, 0, $x, $y, $newWidth, $newHeight);
$dst_img = $tmp_img;
}
$new_thumb_loc = $this->thumb_dir . $imageName;
$result = $this->save($dst_img, $new_thumb_loc, $mime);
imagedestroy($dst_img);
imagedestroy($src_img);
return $result;
}
/**
* Generate thumbnails
*/
public function create(){
// Set environment
$this->set_env();
// check directory location
$this->set_directory();
// result view
if($this->resize_list) $this->show_result_before();
// get all images from the directory
$dir = new \DirectoryIterator($this->path);
$resize_msg = array();
// check if there are files
if($dir->valid()) {
foreach ($dir as $fileinfo) {
if (!$fileinfo->isDot()) {
$i = $this->createThumbnail($fileinfo->getFilename(), $this->width, $this->height);
if($this->resize_list) {
if ($i) echo '<li class="msg-success" ><b>' . $fileinfo->getFilename() . '</b> resized.</li>';
else echo '<li class="msg-error">Resizing error on <b>' . $fileinfo->getFilename() . '</b></li>';
}
$resize_msg[$fileinfo->getFilename()] = (bool)$i;
}
}
}
else {
if($this->resize_list)
echo '<li class="msg-error">No files found</li>';
}
// result view end
if($this->resize_list) $this->show_result_after();
return $resize_msg;
}
}