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php创建缩略图程序
•php图像处理•阅读 247 - function Thumb_IM($thumbwidth, $thumbheight, $preview = 0) {
- global $thumbstatus, $imageimpath, $thumbquality;
- if($thumbstatus) {
- list($img_w, $img_h) = $this->attachinfo;
- $targetfile = !$preview ? ($thumbstatus == 1 || $thumbstatus == 3 ? $this->targetfile.'.thumb.jpg' : $this->targetfile) : DISCUZ_ROOT.'./forumdata/watermark_temp.jpg';
- if(!$this->animatedgif && ($img_w >= $thumbwidth || $img_h >= $thumbheight)) {
- if($thumbstatus != 3) {
- $exec_str = $imageimpath.'/convert -quality '.intval($thumbquality).' -geometry '.$thumbwidth.'x'.$thumbheight.' '.$this->targetfile.' '.$targetfile;
- @exec($exec_str, $output, $return);
- if(emptyempty($return) && emptyempty($output)) {
- $this->attach['thumb'] = $thumbstatus == 1 ? 1 : 0;
- }
- } else {
- $imgratio = $img_w / $img_h;
- $thumbratio = $thumbwidth / $thumbheight;
- if($imgratio >= 1 && $imgratio >= $thumbratio || $imgratio < 1 && $imgratio > $thumbratio) {
- $cuty = $img_h;
- $cutx = $cuty * $thumbratio;
- } elseif($imgratio >= 1 && $imgratio <= $thumbratio || $imgratio < 1 && $imgratio < $thumbratio) {
- $cutx = $img_w;
- $cuty = $cutx / $thumbratio;
- }
- $exec_str = $imageimpath.'/convert -crop '.$cutx.'x'.$cuty.'+0+0 '.$this->targetfile.' '.$targetfile;
- @exec($exec_str, $output, $return);
- $exec_str = $imageimpath.'/convert -quality '.intval($thumbquality).' -geometry '.$thumbwidth.'x'.$thumbheight.' '.$targetfile.' '.$targetfile;
- @exec($exec_str, $output, $return);
- if(emptyempty($return) && emptyempty($output)) {
- $this->attach['thumb'] = $thumbstatus == 1 || $thumbstatus == 3 ? 1 : 0;
- }//开源代码phpfensi.com
- }
- }
- }
- }