php+js实现图片的上传、裁剪、预览、提交示例

首先用到的语言是php、插件imgareaselect没有太多花哨的样式，index.php代码如下： 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 < html  xmlns = "http://www.w3.org/1999/xhtml" > < head > < meta  content = "text/html; charset=UTF-8"  http-equiv = "Content-Type" > < link  rel = "stylesheet"  type = "text/css"  href = "css/imgareaselect-default.css"  /> < script  type = "text/javascript"  src = "scripts/jquery.min.js" > script > < script  type = "text/javascript"  src = "scripts/jquery.imgareaselect.pack.js" > script > < script  type = "text/javascript" > function preview(img, selection) { $('#selectbanner').data('x',selection.x1); $('#selectbanner').data('y',selection.y1); $('#selectbanner').data('w',selection.width); $('#selectbanner').data('h',selection.height);   var scaleX = 100 / (selection.width || 1); var scaleY = 100 / (selection.height || 1); $('#ferret > img').css({ width: Math.round(scaleX * 512) + 'px',//512、390是你上传图片的宽高 height: Math.round(scaleY * 390) + 'px', marginLeft: '-' + Math.round(scaleX * selection.x1) + 'px', marginTop: '-' + Math.round(scaleY * selection.y1) + 'px' }); }   //这里通过jQuery语法在原来图片后插入预览的小图片 $(document).ready(function () { $('< p  id = "ferret" >< img  src = "upload_pic/resized_pic.jpg"  style = "position: relative;"  />< p >').css({ float: 'left', position: 'relative', overflow: 'hidden', width: '100px', height: '100px' })   .insertAfter($('#selectbanner'));   $('#selectbanner').imgAreaSelect({ selectionColor: 'blue', x1:0, y1:0, x2: 100,//初始位置 maxWidth:500,y2:100, aspectRatio: '1:1',//缩放比例 selectionOpacity: 0.2 , onSelectEnd: preview //裁剪后执行的函数，在上面 }); //确认裁剪 $("#sliceButton").click(function() { var pic = $('#selectbanner').attr('src'); // alert(pic); var x,y,w,h; $.post( "cat.php", //（2）将附上这个页面的代码 { x:$('#selectbanner').data('x'), y:$('#selectbanner').data('y'), w:$('#selectbanner').data('w'), h:$('#selectbanner').data('h'), pic:pic }, function(data){ // alert(data); //把裁剪后图片加载到#sure if(data){ $('#sure').attr('src',data); } } ); }); }) script > < title >图片裁剪、预览 title > head > < body > php //上传图片后，把图片复制到upload文件夹下面 if($_POST){ $photo = $_FILES['img']['name']; $tmp_addr = $_FILES['img']['tmp_name'];   $ path  =  'upload/' ; $ type = array ("jpg","gif","jpeg","png"); $ tool  =  substr (strrchr($photo,'.'),1); if(!in_array(strtolower($tool),$type)){ $ text = implode ('.',$type); echo "您只能上传以下类型文件: ",$text," "; }else{ $filename = explode(".",$photo); //把上传的文件名以"."好为准做一个数组。 $time = date("m-d-H-i-s"); //取当前上传的时间 $filename[0] = $time; //取文件名 $name = implode(".",$filename); //上传后的文件名 $uploadfile = $path.$name; $_SESSION['upfile'] = $uploadfile;//上传后的文件名地址 move_uploaded_file($tmp_addr,$uploadfile); } // echo $uploadfile; } ?> < p  id = "s" > < form  action = ""  method = "post"  enctype = "multipart/form-data" > < input  type = "file"  id = "img"  name = "img"  value = ""  onclick = "" /> < input  name = "submit"  id = "submit"  type = "submit"  value = "提交"  class = "submit" /> form > if (isset($_SESSION['upfile'])){?> < img  id = "selectbanner"  name = "selectbanner"  src="" title="mypic"/> p > < p >< input  type = "submit"  id = "sliceButton"  name = "sliceButton"  value = "sliceButton" > p > <  p >< img  id = "sure"  src = ""  style = "cursor:hand"  /> p > body > html >