PHP从0单排（十八）图片处理

<?phpheader ("Content-type:image/jpeg"); $img=imagecreatefromjpeg("cc.jpg");imagejpeg($img);imagedestroy($img);?>

<?php $img=imagecreatefromjpeg("cc.jpg");$x=imagesx($img);$y=imagesy($img);echo "图片cc.jpg的宽为：<b>$x pixels";echo "<br>";echo "<br>";echo "图片cc.jpg的高为：<b>$y</b> pixels";?>

<?php $img_info=getimagesize("cc.jpg");for($i=0;$i<4;++$i){	echo $img_info[$i];	echo "<br/>";		}?>

<?php $pic_name="ee.png";$pic_size=getimagesize($pic_name);?><img  src="<?php%20echo%20%24pic_name;%20?>" echo alt="PHP从0单排（十八）图片处理" >>

<?php function makeimagewatermark($image,$pos,$water_text,$font_size,$color){	$font_type="c://WINDOWS//Fonts//SIMYOU.TTF";	if(!empty($image)&& file_exists($image))	{		$img_info=getimagesize($image);		$g_w=$img_info[0];		$g_h=$img_info[1];		switch($img_info[2])		{			case 1:			$img=imagecreatefromgif($image);			break;			case 2:			$img=imagecreatefromjpeg($image);			break;			case 3:			$img=imagecreatefrompng($image);			break;			default:			die("Format Wrong");						}				}	else 	{		die("Not exists!");				}		$temp=imagettfbbox(ceil($font_size*2.5),0,$font_type,$water_text);	$w=$temp[2]-$temp[6];	$h=$temp[3]-$temp[7];	if(($g_w<$w) || ($g_h<$h))	{		echo "Too small!";		return;				}	switch($pos){	case 0:	$pos_x=rand(0,($g_w-$w));	$pos_y=rand(0,($g_h-$h));	break;	case 1:	$pos_x=0;	$pos_y=0;	break;	case 2:	$pos_x=($g_w-$w)/2;	$pos_y=($g_h-$h)/2;	break;	case 3:	$pos_x=$g_w-$w;	$pos_y=$g_h-$h;	break;	default:	$pos_x=rand(0,($g_w-$w));	$pos_y=rand(0,($g_h-$h));	break;		}			imagealphablending($img,true);//设置图像混色模式		if(!empty($color) && (strlen($color)==7)){	$R=hexdec(substr($color,1,2));	$G=hexdec(substr($color,3,2));	$B=hexdec(substr($color,5));		}		else 	{		die("Format wrong!");				}		$text_color=imagecolorallocate($img,$R,$G,$B);				imagettftext($img,$font_size,0,$pos_x,$pos_y,$text_color,$font_type,$water_text);				switch($img_info[2])		{			case 1 :			imagegif($img,$image);			break;			case 2 :			imagejpeg($img,$image);			break;			case 3:			imagepng($img,$image);			break;			default:			die("Formate unSupport!");						}	imagedestroy($img);		}if(isset($_FILES) && !empty($_FILES['userfile'])&& $_FILES['userfile']['size']>0){$uploadfile="./".time()."_".$_FILES['userfile']['name'];if(copy($_FILES['userfile']['tmp_name'],$uploadfile)){    makeimagewatermark($uploadfile,2,"Photo by Mac",16,"#43042A");	echo "<img  src="%5C%22%22.%24uploadfile.%22%5C%22" border='\"0\"' alt="PHP从0单排（十八）图片处理" >";		}else{	echo "uploadWrong!<br>";	}}?><title>19.9.php</title>

<?php header("Content-type:image/jpeg");$img_name="cc.jpg";$src_img=imagecreatefromjpeg($img_name);$ow=imagesx($src_img);$oh=imagesy($src_img);$nw=round($ow*200.0/$ow);$nh=round($oh*200.0/$oh);$desc_img=imagecreate($nw,$nh);imagecopyresized($desc_img,$src_img,0,0,0,0,$nw,$nh,$ow,$oh);imagejpeg($desc_img);imagedestroy($desc_img);imagedestroy($src_img);?>

<?php header("Content-type:image/jpeg");$img_name="cc.jpg";$percent=0.2;$src_img=imagecreatefromjpeg($img_name);$ow=imagesx($src_img);$oh=imagesy($src_img);$nw=$ow*$percent;$nh=$oh*$percent;$desc_img=imagecreatetruecolor($nw,$nh);imagecopyresampled($desc_img,$src_img,0,0,0,0,$nw,$nh,$ow,$oh);imagejpeg($desc_img);imagedestroy($desc_img);imagedestroy($src_img);?>