如何在上傳時裁剪圖像？

Question

我正在做一個社交網絡項目，我可以選擇添加/編輯照片。當用戶點擊按鈕時，圖像將被上傳到數據庫並且它將被更新...是否可以在圖像被裁剪之前裁剪圖像保存到數據庫中。

Answer 1

只需調用此函數..與param源，目標和大小你想要的:)

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);
        }       

Answer 2

在客戶端，我推薦JCrop 。

Answer 3

當然，將文件移出uploads目錄並移動到某個臨時目錄中，將該位置存儲在會話中，然后將其顯示回它們並讓它們在將其移動到生產區域並將其插入數據庫之前將其裁剪。