PHP截取图片php+imgareaselect实现图片裁剪

简介

imgareaselect的js图片裁剪控件。

官方网址：

http://odyniec.net/projects/imgareaselect/

使用

引用css

  /js/jquery.imgareaselect-0.9.10/css/imgareaselect-default.css
    引用js
    /js/jquery.imgareaselect-0.9.10/scripts/jquery.imgareaselect.min.js
    /js/AjaxFileUploaderV2.1/ajaxfileupload.js

<div>
    <img src='blank.jpg' id="mainimg">
</div>
<div id="myPreview" >
    <img src="blank.jpg" id="mainimgthumb" />
</div>
    <form name="fmCrop">
        <input type="hidden" name="src_path"  value="" />
        <input type="hidden" name="x1" value="" />
        <input type="hidden" name="x2" value="" />
        <input type="hidden" name="y1" value="" />
        <input type="hidden" name="y2" value="" />
        <input type="submit" name="btnSubmit" class="baseinf_but1" style="display:none" value="确定" />
    </form>
   
     $("#mainimg_src", content).load(function () {
        crop($("#mainimg", content));
     });
     function crop($img) { //$img是
                          //缩小比例
                          var scalex =$img.width() / $("#mainimg_src").width();
                          var scaley =$img.height() / $("#mainimg_src").height();
                          $img.imgAreaSelect({
                              x1:0,y1:0,x2:150,y2:150,
                              handles: true, aspectRatio: '1:1',
                              onSelectEnd: function (img, selection) {
                                  var scaleX = 100 / (selection.width || 1);
                                  var scaleY = 100 / (selection.height || 1);
                                  $('#mainimgthumb').css({
                                      width: Math.round(scaleX * 400) + 'px',
                                      height: Math.round(scaleY * 300) + 'px',
                                      marginLeft: '-' + Math.round(scaleX * selection.x1) + 'px',
                                      marginTop: '-' + Math.round(scaleY * selection.y1) + 'px'
                                  });
                                  $('input[name="x1"]', content).val(selection.x1/scalex);
                                  $('input[name="y1"]', content).val(selection.y1/scaley);
                                  $('input[name="x2"]', content).val(selection.x2/scalex);
                                  $('input[name="y2"]', content).val(selection.y2/scaley);
                              }
                          });
                      }

确定裁剪

//确定剪切
$("form[name=fmCrop]", content).submit(function () {
    var data = $("form[name=fmCrop]", content).serializeArray();
    $.get('/members/web-members-rest/crop.html', data, function (r) {
        switch (r.result) {
             case "Success":
                 jAlert("操作成功");
                 $("#left_mainimg").attr("src", "/" + r.path + '?a=' + (new Date()).format('yyyyMMddhhmmss'));
                 $("#myPreview", content).css("display", "block");
                 $("#myPreview", content).prev().css("display", "none");
                 $("#mainimg", content).imgAreaSelect({ hide: true });
                 $("form[name=fmUpload]", content).css("display", "none");
                 $("input[name=btnSubmit]", content).css("display", "none");
                 break;
                }
    });
    return false;
});

服务器端php代码

public function actionCrop($src_path,$x1,$x2,$y1,$y2){
        $pic =$src_path;
        $width = $x2-$x1;
        $height = $y2-$y1;
        $type=exif_imagetype($pic);  //判断文件类型
        $support_type=array(IMAGETYPE_JPEG , IMAGETYPE_PNG , IMAGETYPE_GIF);
        if(!in_array($type, $support_type,true)) {
            echo "this type of image does not support! only support jpg , gif or png";
            exit();
        }
        switch($type) {
            case IMAGETYPE_JPEG :
                $image = imagecreatefromjpeg($pic);
                break;
            case IMAGETYPE_PNG :
                $image = imagecreatefrompng($pic);
                break;
            case IMAGETYPE_GIF :
                $image = imagecreatefromgif($pic);
                break;
            default:
                echo "Load image error!";
                exit();
        }
        $copy = $this->PIPHP_ImageCrop($image, $x1, $y1, $width, $height);//裁剪
        imagejpeg($copy, $src_path);  //替换新图
        return ['result'=>'Success','path'=>$src_path]; //返回新图地址
    }
    function PIPHP_ImageCrop($image, $x, $y, $w, $h){
        $tw = imagesx($image);  
        $th = imagesy($image);  
        if ($x > $tw || $y > $th || $w > $tw || $h > $th) return FALSE;  
        $temp = imagecreatetruecolor($w, $h);  
        imagecopyresampled($temp, $image, 0, 0, $x, $y, $w, $h, $w, $h);  
        return $temp;  
    }