如何在上传时裁剪图像?

时间:2010-07-16 10:37:30

标签: php image crop

我正在做一个社交网络项目,我可以选择添加/编辑照片。当用户点击按钮时,图像将被上传到数据库并且它将被更新...是否可以裁剪图像在将其保存到数据库之前。

3 个答案:

答案 0 :(得分:4)

只需调用此函数..与param源,目标和大小你想要的东西:)

function cropImage($source,$dest,$whsize) {

                $size = getimagesize($source);
                $w = $size[0];
                $h = $size[1];
                $xratio=$w/$whsize;
                $yratio=$h/$whsize;

                if($xratio > $yratio)$multiplier=$xratio;
                else $multiplier=$yratio;

                $nw=$w/$multiplier;
                $nh=$h/$multiplier;
                switch($size[2]) {
                    case '1':
                    $simg = imagecreatefromgif($source);
                    break;
                    case '2':
                    $simg = imagecreatefromjpeg($source);
                    break;
                    case '3':
                    $simg = imagecreatefrompng($source);
                    break;
                }

                $dimg = imagecreatetruecolor($nw, $nh);

                $wm = $w/$nw;
                $hm = $h/$nh;

                $h_height = $nh/2;
                $w_height = $nw/2;

                if($w> $h) {

                    $adjusted_width = $w / $hm;
                    $half_width = $adjusted_width / 2;
                    $int_width = $half_width - $w_height;

                    imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h);

                } elseif(($w <$h) || ($w == $h)) {

                    $adjusted_height = $h / $wm;
                    $half_height = $adjusted_height / 2;
                    $int_height = $half_height - $h_height;

                    imagecopyresampled($dimg,$simg,0,-$int_height,0,0,$nw,$adjusted_height,$w,$h);

                } else {
                    imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h);
                }
             $dest=$dest.'jpeg';
                imagejpeg($dimg,$dest,100);
        }       

答案 1 :(得分:3)

在客户端,我建议JCrop

答案 2 :(得分:1)

当然,将文件移出uploads目录并移动到某个临时目录中,将该位置存储在会话中,然后将其显示回给他们,让他们在将其移动到您的生产区域并将其插入之前将其裁剪掉数据库。