如何解决PHPCMS缩略图不清楚的问题

本篇文章为大家展示了如何解决PHPCMS缩略图不清楚的问题，代码简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

首先在phpcms下面的libs中找到classes目录并打开；然后找到"image.class.php"这个文件并打开；最后搜索到调用"$imagefun()"函数的地方并传第三个参数为90即可。

搜索到下这个函数

function thumb($image, $filename = '', $maxwidth = 200, $maxheight = 200, $suffix='', $autocut = 0, $ftp = 0) {        if(!$this->thumb_enable || !$this->check($image)) return false;        $info  = image::info($image);        if($info === false) return false;                $srcwidth  = $info['width'];                $srcheight = $info['height'];                $pathinfo = pathinfo($image);                $type =  $pathinfo['extension'];                if(!$type) $type = $info['type'];                $type = strtolower($type);                unset($info);                $creat_arr = $this->getpercent($srcwidth,$srcheight,$maxwidth,$maxheight);                $createwidth = $width = $creat_arr['w'];                $createheight = $height = $creat_arr['h'];                $psrc_x = $psrc_y = 0;                if($autocut && $maxwidth > 0 && $maxheight > 0) {                        if($maxwidth/$maxheight<$srcwidth/$srcheight && $maxheight>=$height) {                                $width = $maxheight/$height*$width;                                $height = $maxheight;                        }elseif($maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width) {                                $height = $maxwidth/$width*$height;                                $width = $maxwidth;                        }                        $createwidth = $maxwidth;                        $createheight = $maxheight;                }                $createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type);                $srcimg = $createfun($image);                if($type != 'gif' && function_exists('imagecreatetruecolor'))                        $thumbimg = imagecreatetruecolor($createwidth, $createheight);                 else                        $thumbimg = imagecreate($width, $height);                 if(function_exists('imagecopyresampled'))                        imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);                 else                        imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height,  $srcwidth, $srcheight);                 if($type=='gif' || $type=='png') {                        $background_color  =  imagecolorallocate($thumbimg,  0, 255, 0);  //  指派一个绿色                          imagecolortransparent($thumbimg, $background_color);  //  设置为透明色，若注释掉该行则输出绿色的图                 }                if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace);                $imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);                if(empty($filename)) $filename  = substr($image, 0, strrpos($image, '.')).$suffix.'.'.$type;                $imagefun($thumbimg, $filename);                imagedestroy($thumbimg);                imagedestroy($srcimg);                if($ftp) {                        @unlink($image);                }                return $filename;    }

然后找到

if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace);$imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);if(empty($filename)) $filename  = substr($image, 0, strrpos($image, '.')).$suffix.'.'.$type;$imagefun($thumbimg, $filename);imagedestroy($thumbimg);imagedestroy($srcimg);

改为

if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace);$imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);if(empty($filename)) $filename  = substr($image, 0, strrpos($image, '.')).$suffix.'.'.$type;$imagefun($thumbimg, $filename, 90);imagedestroy($thumbimg);imagedestroy($srcimg);

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