GD를 이용한 기본기능 썸네일,CROP,CROP썸네일,텍스트 만들기

gd 보다 잘 정리된 ImageMagick 클래스, Gmagick 클래스를 추천합니다만 저것들이 설치되어 있지 않으면 GD를 활용해야 하기에 무식하게 일단 만들어 봤습니다.
출처: phpschool

<?php
/** ====================================================== 
| @Author    : 김종관 
| @Email    : apmsoft@gmail.com 
| @HomePage    : http://www.apmsoftax.com 
| @Editor    : Eclipse(default) 
| @UPDATE    : 2010-02-16 
----------------------------------------------------------*/ 

# purpose : 이미지 효과주기
class ImageGD
{
	private $filename;

	private $im;
	private $quality =100;
	private $bgcolor = 0x7fffffff;
	private $fontsrc,$fontangle=0,$fontcolor = array(0,0,0),$fontsize = 20,$x=5,$y=5;

	# 시작
	public function __construct($filename=null){
		if(!file_exists($filename) && $filename)
			 throw new Exception($filename);
		
		$this->filename = $filename;
	}

	# void 퀄리티 설정
	public function setCompressionQuality($quality){
		$this->quality = $quality;
	}

	# 칼라 채우기
	public function setFilledrectangle($image,$x1,$y1,$x2,$y2,$color){
		if(false === ($im = imagefilledrectangle($image,$x1,$y1,$x2,$y2,$color))) return false;
	return $im;
	}

	# 칼라 채우기 RGB
	public function setColorallocate($image,$r,$g,$b){
		if(0 > ($im = imagecolorallocate($image,$r,$g,$b))) return false;
	return $im;
	}

	# alpha
	public function setAlphablending($image,$boolean=false){
		imagealphablending($image, $boolean);
	}
	# alpha
	public function setSavealpha($image,$boolean=false){
		imagesavealpha($image, $boolean);
	}

	public function setFttext($image,$fontcolor,$text){
		imagefttext($image,$this->fontsize,$this->fontangle,$this->x,$this->y,$fontcolor,$this->fontsrc,$text);
	}

	# 폰트 파일 경로 지정
	public function setFont($fontsrc){ $this->fontsrc = $fontsrc; }

	# 칼라 지정
	public function setFontColor($color){ $this->color = $color; }

	# 폰트 사이즈
	public function setFontSize($pixel){ $this->fontsize = $pixel; }

	# 배경칼라
	public function setBgColor($bgcolor){ $this->bgcolor = $bgcolor; }

	# 폰트 앵글
	public function setFontAngle($angle){ $this->fontangle = $angle; }

	# x:y 축
	public function setXY($x,$y){ $this->x = $x; $this->y = $y; }

	# 텍스트 이미지 만들기
	public function writeTextImage($width,$height,$text){
		$this->im = self::createTrueImage($width,$height);
		self::setAlphablending($this->im);
		self::setFilledrectangle($this->im,0,0,$width,$height,$this->bgcolor);
		
		$fontcolor = self::setColorallocate($this->im,$this->fontcolor[0],$this->fontcolor[1],$this->fontcolor[2]);
		self::setFttext($this->im,$fontcolor,$text);
		self::setSavealpha($this->im,true);
	}

	public function setAntialias($image,$boolean=false){
		imageantialias($image,$boolean);
	}

	public function setTTFText($image,$size,$x,$y,$color,$text){
		imagettftext($image,$size,$this->fontangle,$x,$y,$color,$this->fontsrc,$text);
	}

	# 그림자 입체 텍스트 쓰기
	public function 
writeShadowText($width,$height,$text,$bgRGB=array(255,255,255),$mdRGB=array(128,128,128),$frontRGB=array(0,0,0))
	{
		$this->im = self::createTrueImage($width,$height);

		$bg = self::setColorallocate($this->im,$bgRGB[0],$bgRGB[1],$bgRGB[2]);
		$middle = self::setColorallocate($this->im, $mdRGB[0],$mdRGB[1],$mdRGB[2]);
		$front = self::setColorallocate($this->im, $frontRGB[0],$frontRGB[1],$frontRGB[2]);
		self::setFilledrectangle($this->im,0,0,$width-1,$height-1,$bg);
		
		// Add some shadow to the text
		self::setTTFText($this->im,$this->fontsize,$this->x,$this->y,$middle,$text);
		
		// Add the text
		self::setTTFText($this->im,$this->fontsize,$this->x - 1,$this->y - 1,$front,$text);
	}

	# 이미지 위에 텍스트 쓰기
	public function combineImageText($width,$height,$text,$filename=null){
		$this->im = self::createTrueImage($width,$height);
		self::setAntialias($this->im,true);
		$fontcolor = self::setColorallocate($this->im,$this->fontcolor[0],$this->fontcolor[1],$this->fontcolor[2]);
		
		$filename = ($filename) ? $filename : $this->filename;
		if(!$filename) throw new Exception(__CLASS__,':'.__METHOD__.':'.__LINE__);
		$image = self::readImage($filename);
		self::copy($this->im,$image,0,0,0,0,$width,$height);
		self::setTTFText($this->im,$this->fontsize,$this->x,$this->y,$fontcolor,$text);
	}

	# margin_r : 오른쪽 여백, margin_b : 아래여백
	public function filterWatermarks($marksfilename,$margin_r=10,$margin_b=10){
		if(!file_exists($marksfilename))
			 throw new Exception(__CLASS__.':'.__METHOD__.':'.$marksfilename);
			 
		$this->im = self::readImage($this->filename);
		self::setAntialias($this->im,true);
		$image = self::readImage($marksfilename);
		
		$width = imagesx($image);
		$height = imagesy($image);
		$im_x = imagesx($this->im) - $width - $marge_r;
		$im_y = imagesy($this->im) - $height - $marge_b;
		
		self::copy($this->im,$image,$im_x,$im_y,0,0,$width,$height);
	}

	# void 이미지 자르기 int width,height,x,y
	public function cropImage($width,$height,$x,$y){
		$this->im = self::createTrueImage($width,$height);
		$image = self::readImage($this->filename);
		if(self::copy($this->im,$image,0,0,$x,$y,$width,$height) === false)
			 throw new Exception(__METHOD__);
	}

	# void 이미지 자르기 (center) int width,height
	public function cropThumbnailImage($width,$height){
		$imgsize = self::getImageSize($this->filename);
		
		# 조정
		$im_x = 0;
		$im_y = 0;
		$image_x = 0;
		$image_y = 0;

		$wm = $imgsize->width/$width;
		$hm = $imgsize->height/$height;
		$h_height = $height/2;
		$w_height = $width/2;

		if($imgsize->width > $imgsize->height){
			 $width = $imgsize->width / $hm;
			 $half_width = $width / 2;
			 $im_x = -($half_width - $w_height);
		}else if(($imgsize->width <$imgsize->height) || ($imgsize->wdith == $imgsize->height)){
			 $height = $imgsize->height / $wm;
			 $half_height = $height / 2;
			 $im_y = $half_height - $h_height;
		}
		
		$this->im = self::createTrueImage($width,$height);
		$image = self::readImage($this->filename);
		if(self::copyResampled($this->im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$imgsize->width,$imgsize->height) === false)
			 throw new Exception(__METHOD__);
		return true;
	}

	# 썸네일 이미지 만들기 int width, height
	public function thumbnailImage($width,$height){
		$imgsize = self::getImageSize($this->filename);

		# 썸네일 사진 사이즈 설정
		if($imgsize->width>$imgsize->height){
			 $height= ceil(($imgsize->height*$width)/$imgsize->width);
		}
		else if($imgsize->width<$imgsize->height || $imgsize->width == $imgsize->height){
			 $width= ceil(($imgsize->width*$height)/$imgsize->height);
		}

		$this->im = self::createTrueImage($width,$height);
		$image = self::readImage($this->filename);
		if(self::copyResampled($this->im, $image, 0,0,0,0,$width,$height,$imgsize->width,$imgsize->height)===false)
			 throw new Exception(__METHOD__);
		return true;
	}

	# imagecopy
	public function copy($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height){
		if(imagecopy($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height) === false) return false;
		return true;
	}

	# imagemerge
	public function copyMerge($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$pct){
		if(!imagecopymerge($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$pct)) return false;
		return true;
	}

	# imagecopyresampled
	public function copyResampled($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$oriwidth,$oriheight){
		if(imagecopyresampled($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$oriwidth,$oriheight)===false) return false;
	return true;
	}

	# void : createtruecolor
	public function createTrueImage($width,$height){
		return $im = imagecreatetruecolor($width,$height);
	}

	# void
	public function readImage($filename){
		$count = strrpos($filename,'.');
		$extention = strtolower(substr($filename, $count+1));
		switch($extention){
			 case 'gif': $image = imagecreatefromgif($filename); break;
			 case 'png': $image = imagecreatefrompng($filename); break;
			 case 'jpeg': 
			 case 'jpg': $image = imagecreatefromjpeg($filename); break;
			 default : throw new Exception('i can't the image format'); 
		}
	return $image;
	}

	# string filename
	public function write($filename){
		$count = strrpos($filename,'.');
		$extention = strtolower(substr($filename, $count+1));
		switch($extention){
			 case 'gif': imagegif($this->im,$filename); return true; break;
			 case 'png': imagepng($this->im,$filename,($this->quality/10)-1); return true; break;
			 case 'jpg':
			 case 'jpeg': imagejpeg($this->im,$filename,$this->quality); return true; break;
			 default : return false;
		}
	}
	
	# @ void : GD 버전
	public function getVersion(){
		if(function_exists('gd_info')){
			 $info = gd_info();
			 return preg_replace('/bundled \((.*) compatible\)/','\\1', $info['GD Version']);
		}
		return false;
	}

	# 이미지 사이즈
	public function getImageSize($filename=null){
		$filename = ($filename) ? $filename : $this->filename;
		$img_info = getImageSize($filename);
		return json_decode(json_encode(array('width'=>$img_info[0],'height'=>$img_info[1],'mime'=>$img_info['mime'])));
	}

	# @ void
	public function destroy(){ 
		if(is_resource($this->im)) imagedestroy($this->im);
	}

	public function __destruct(){
		self::destroy();
	}
}
?>

################
## 활용법
################

<?php 
try{ 
	$gd = new ImageGD($_SERVER['DOCUMENT_ROOT'].'/testdirectory/P100119003.jpg'); 
	echo 'gd버전: '.$gd->getVersion().'<br />'; 

	# 사진 이미지 사이즈 
	$img_info = $gd->getImageSize(); 
	echo '원본 사진크기 : '.$img_info->width.' x '.$img_info->height.'<br />'; 

	# 썸네일 이미지 만들기 
	echo '썸네일 이미지 만들기 120x120<br />'; 
	$gd->thumbnailImage(120,120); 
	$gd->write($_SERVER['DOCUMENT_ROOT'].'/testdirectory/thumb.jpg'); 
	echo '<img src="/testdirectory/thumb.jpg" /><br />'; 

	# 이미지 자르기 
	echo '이미지 자르기 500x150,x:150,y:100<br />'; 
	$gd->cropImage(500,150,150,100); 
	$gd->write($_SERVER['DOCUMENT_ROOT'].'/testdirectory/crop.jpg'); 
	echo '<img src="/testdirectory/crop.jpg" /><br />'; 

	# 이미지 자르기 썸네일 
	echo '이미지 자르기 썸네일 120x120<br />'; 
	$gd->cropThumbnailImage(120,120); 
	$gd->write($_SERVER['DOCUMENT_ROOT'].'/testdirectory/cropthumb.jpg'); 
	echo '<img src="/testdirectory/cropthumb.jpg" /><br />'; 
	 
	# 필터 워터마크 찍기 
	echo '필터 워터마크 찍기<br />'; 
	$gd = new ImageGD($_SERVER['DOCUMENT_ROOT'].'/testdirectory/crop.jpg'); 
	$gd->filterWatermarks($_SERVER['DOCUMENT_ROOT'].'/testdirectory/thumb.jpg'); 
	$gd->write($_SERVER['DOCUMENT_ROOT'].'/testdirectory/watermark.jpg'); 
	echo '<img src="/testdirectory/watermark.jpg" /><br />'; 

	echo '타이틀 이미지 만들기<br />'; 
	$gd = new ImageGD(); 
	$gd->setBgColor(0x7fffffff); 
	$gd->setFont($_SERVER['DOCUMENT_ROOT'].'/HYSUPM.TTF'); 
	$gd->setFontColor(array(0,0,0)); 
	$gd->setFontSize(20); 
	$gd->setXY(5,40); 
	$gd->writeTextImage(500,60,'김형오 의장, 설 앞두고 용산노인복지관'); 
	$gd->write($_SERVER['DOCUMENT_ROOT'].'/testdirectory/textimage.png'); 
	echo '<img src="/testdirectory/textimage.png" /><br />'; 

	echo '이미지 위에 글씨 넣기<br />'; 
	$gd = new ImageGD($_SERVER['DOCUMENT_ROOT'].'/testdirectory/watermark.jpg'); 
	$gd->setFont($_SERVER['DOCUMENT_ROOT'].'/HYSUPM.TTF'); 
	$gd->setFontColor(array(255,255,255)); 
	$gd->setFontSize(20); 
	$gd->setXY(5,40); 
	$gd->combineImageText(500,60,'김형오 의장, 설 앞두고 용산노인복지관'); 
	$gd->write($_SERVER['DOCUMENT_ROOT'].'/testdirectory/combineimagetext.png'); 
	echo '<img src="/testdirectory/combineimagetext.png" /><br />'; 

	echo '그림자 텍스트 이미지<br />'; 
	$gd = new ImageGD(); 
	$gd->setFont($_SERVER['DOCUMENT_ROOT'].'/HYMJRE.TTF'); 
	$gd->setFontSize(20); 
	$gd->setXY(5,40); 
	$gd->writeShadowText(500,60,'연중돌봄학교로 ‘제2의 개교’ 맞는 고창성송초'); 
	$gd->write($_SERVER['DOCUMENT_ROOT'].'/testdirectory/shadowtext.png'); 
	echo '<img src="/testdirectory/shadowtext.png" /><br />'; 

}catch(Exception $e){ 
	echo $e->getMessage(); 
}
?>

########
# 붙임글
########
네 저거 초기작이라 아직 어설퍼서리... 지금 php5용 템플릿 클래스 만드느라 잠시 여기 뜸했네요
저거 php4 버전용으로 고치시면 되는데요
public, private,__construct 매직메소등 등 이런거 지우시고요
self:: 이거 4에서도 되었었나 아무튼 안되면 이걸로  $this-> 바꾸시고

// json 부분은 배열로 바꾸세요
json_decode(json_encode(array('width'=>$img_info[0],'height'=>$img_info[1],'mime'=>$img_info['mime'])));

이렇게
return array('width'=>$img_info[0],'height'=>$img_info[1],'mime'=>$img_info['mime']);

이 부분은
$imgsize = self::getImageSize($this->filename);
       
아래처럼 호출하던것을
$imgsize->width
$imgsize->height

이렇게
$imgsize['width']
사용하시면 됩니다.