本篇文章主要介绍如何实现php代码处理图片，感兴趣的朋友参考下，希望对大家有所帮助。
一、 图片缩放代码
非等比例图片缩放代码
$fileNames='./images/hee.jpg';list($s_w,$s_h)=getimagesize($fileNames);$per=0.3;$n_w=$s_w*$per;$n_h=$s_h*$per;$s_img=imagecreatefromjpeg($fileNames);$n_img=imagecreatetruecolor($n_w,$n_h);imagecopyresized($n_img,$s_img,0,0,0,0,$n_w,$n_h,$s_w,$s_h);header("Content-Type:image/jpeg");imagejpeg($n_img,'./images/hee2.jpg');imagedestroy($n_img);imagedestroy($s_img);function sf($backgroung,$bl,$location){list($width,$height)=getimagesize($backgroung);$n_w=$width*$bl;$n_h=$height*$bl;$s_img=imagecreatefromjpeg($backgroung);$n_img=imagecreatetruecolor($n_w,$n_h);imagecopyresized($n_img,$s_img,0,0,0,0,$n_w,$n_h,$width,$height);header("Content-Type:image/jpeg");imagejpeg($n_img,$location);imagedestroy($s_img);imagedestroy($n_img);}//sf('./images/hee.jpg',0.3,'./images/hee9.jpg');
等比例图片缩放（并且加了透明色处理）
function imagesf($backgroung,$n_w,$n_h,$newFiles){list($s_w,$s_h,$imagetype)=getimagesize($backgroung);//等比例缩放固定算法if ($n_w && ($s_w < $s_h)) {$n_w = ($n_h / $s_h) * $s_w;} else {$n_h = ($n_w / $s_w) * $s_h;}if($imagetype==2){$s_img=imagecreatefromjpeg($backgroung);}elseif($imagetype==3){$s_img=imagecreatefrompng($backgroung);}elseif($imagetype==1){$s_img=imagecreatefromgif($backgroung);}else{echo "php 不支持这中图片类型！！";}$n_img=imagecreatetruecolor($n_w,$n_h);//取得原图形的索引$img_index=imagecolortransparent($s_img);//判断原图形索引是否在图形调色板的数目范围内（调色板数目 0~255）；if($img_index>=0 && $img_index<imagecolorstotal($s_img)){//返回一个具有 red，green，blue 和 alpha 的键名的关联数组，包含了指定颜色索引的相应的值$trans=imagecolorsforindex($s_img,$img_index);//print_r($trans); Array ( [red] => 255 [green] => 255 [blue] => 255 [alpha] => 127 )//取原图的颜色，给新图分配颜色$n_color=imagecolorallocate($n_img,$trans['red'],$trans['green'],$trans['blue']);imagefill($n_img,0,0,$n_color);//把获取到的颜色，设置为新图的透明色imagecolortransparent($n_img,$n_color);}//imagecopyresampled($n_img,$s_img,0,0,0,0,$n_w,$n_h,$s_w,$s_h);if(imagetypes()& IMG_JPG){header("Content-Type:image/jpeg");imagejpeg($n_img,$newFiles);}elseif(imagetypes()& IMG_PNG){header("Content-Type:image/png");imagepng($n_img,$newFiles);}elseif(imagetypes()& IMG_GIF){header("Content-Type:image/gif");imagegif($n_img,$newFiles);}else{echo "php 不支持这中图片类型！！";}imagedestroy($s_img);imagedestroy($n_img);}imagesf('./images/map.gif',200,200,'./images/map2.gif');
二、 图片裁剪代码
图片裁剪
function imagecut($backgroung,$cut_x,$cut_y,$cut_width,$cut_hight,$fileNames){list(,,$imagetype)=getimagesize($backgroung);if($imagetype==1){$s_img=imagecreatefromgif($backgroung);}elseif($imagetype==2){$s_img=imagecreatefromjpeg($backgroung);}elseif($imagetype==2){$s_img=imagecreatefrompng($backgroung);}else{echo "php 不支持这种图片类型！！";}$n_img=imagecreatetruecolor($cut_width,$cut_hight);imagecopyresized($n_img,$s_img,0,0,$cut_x,$cut_y,$cut_width,$cut_hight,$cut_width,$cut_hight);if(imagetypes() & IMG_GIF){header("Content-Type:image/gif");imagegif($n_img,$fileNames);}elseif(imagetypes() & IMG_JPG){header("Content-Type:image/jpeg");imagejpeg($n_img,$fileNames);}elseif(imagetypes() & IMG_PNG){header("Content-Type:image/png");imagepng($n_img,$fileNames);}else{echo "php 不支持这种图片类型！！";}}//imagecut('./images/hee.jpg',52, 47, 345, 330,'./images/hee4.jpg');function cut($backgroung,$x,$y,$cut_width,$cut_hight,$location){$s_img=imagecreatefromjpeg($backgroung);$n_img=imagecreatetr<b style="color:transparent">本文来源gao@!dai!ma.com搞$$代^@码!网!</b><strong>搞gaodaima代码</strong>uecolor($cut_width,$cut_hight);imagecopy($n_img,$s_img,0,0,$x,$y,$cut_width,$cut_hight);header("Content-Type:image/jpeg");imagejpeg($n_img,$location);imagedestroy($s_img);imagedestroy($n_img);}//cut('./images/hee.jpg',52, 47, 345, 330,'./images/hee8.jpg');搞代码网（gaodaima.com）提供的所有资源部分来自互联网，如果有侵犯您的版权或其他权益，请说明详细缘由并提供版权或权益证明然后发送到邮箱[email protected]，我们会在看到邮件的第一时间内为您处理，或直接联系QQ：872152909。本网站采用BY-NC-SA协议进行授权
转载请注明原文链接：如何实现php代码处理图片
