PHP上传图片例子 源码下载
两个文件：
tu.php
upload.php
tu.php 代码：
?1 <?php ?2 ini_set("display_errors", "On"); ?3 error_reporting(E_ALL | E_STRICT); ?4 ?> ?5 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> ?6 <html xmlns="http://www.w3.org/1999/xhtml"> ?7 <head> ?8 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> ?9 <title>上传图片</title> 10 </head> 11 ?12 <body> 13 <h1>上传图片</h1> 14 ?15 <div id="divPreview"> 16 ????????<img id="imgHeadPhoto" src="noperson.jpg" style="width: 160px; height: 170px; border: solid 1px #d2e2e2;" 17 ?????????????/> 18 </div> 19 <!--enctype 属性规定在发送到服务器之前应该如何对表单数据进行编码,"multipart/form-data"在使用包含文件上传控件的表单时，必须使用该值。--> 20 <form action="upload.php" method="post" enctype="multipart/form-data"> 21 <!--file定义输入字段和 "浏览"按钮，供文件上传。--> 22 ????<input type="file" name="file" onchange="PreviewImage(this,‘imgHeadPhoto‘,‘divPreview‘);" size="20" /> 23 ????<input ?type="submit" value="上传"/> 24 ?25 </form> 26 ?27 ?28 ?29 <div> 30 <?php 31 $page=isset($_GET[‘page‘])?$_GET[‘page‘]:0;//从零开始 32 $imgnums = 5; ???//每页显示的图片数 33 $path="./img/"; ??//图片保存的目录 34 $handle = opendir($path); ?35 $i=0; 36 while (false !== ($file = readdir($handle))) { 37 list($filesname,$ext)=explode(".",$file); 38 if($ext=="gif" or $ext=="jpg" or $ext=="JPG" or $ext=="png" ) { 39 if (!is_dir(‘./‘.$file)) { 40 $array[]=$file;//保存图片名称 41 ++$i; 42 } } } ?43 ?44 ?if($array){ ??45 rsort($array);//修改日期倒序排序 46 } 47 ?48 for($j=$imgnums*$page; $j<($imgnums*$page+$imgnums)&&$j<$i; ++$j){ 49 echo ‘<div>‘; 50 echo $array[$j].‘<br />‘; 51 $img_info = getimagesize($path.$array[$j]); 52 echo $img_info[0].‘<br />‘; 53 if ($img_info[0]>180){//图片宽度大于180像素的，以宽180显示，高以等比例缩小，宽小于180像素的图片，不作任何改变 54 ????echo "<img src=".$path.$array[$j]." width=‘180‘ height=‘".($img_info[1]*(180/$img_info[0]))."‘><br />"; 55 ????}else{ 56 ????echo "<img src=".$path.$array[$j]." ><br />"; 57 ?????58 ????} 59 echo ‘</div>‘; 60 } ?61 ?62 ????????????????$realpage = @ceil($i / $imgnums) - 1; 63 ????????????????$Prepage = $page-1; 64 ????????????????$Nextpage = $page+1; ?65 ????????if($Prepage<0){ ??66 ????????????????echo "上一页 "; 67 ????????????????echo "<a href=?page=$Nextpage>下一页</a> "; 68 ????????????????echo "<a href=?page=$realpage>最末页</a> "; 69 ????????}elseif($Nextpage >= $realpage){ 70 ????????????????echo "<a href=?page=0>首页</a> "; 71 ????????????????echo " <a href=?page=$Prepage>上一页</a> "; 72 ????????????????echo " 下一页"; 73 ????????}else{ 74 ????????????????echo "<a href=?page=0>首页</a> "; ?75 ????????????????echo "<a href=?page=$Prepage>上一页</a> "; 76 ????????????????echo "<a href=?page=$Nextpage>下一页</a> "; 77 ????????????????echo "<a href=?page=$realpage>最末页</a> "; 78 ????????} 79 ?80 ?81 ?82 ?83 ?> 84 ?85 </div> 86 </body> 87 <script type="text/javascript"> 88 ????????//js本地图片预览，兼容ie[6-9]、火狐、Chrome17+、Opera11+、Maxthon3 89 ????????function PreviewImage(fileObj, imgPreviewId, divPreviewId) { 90 ????????????var allowExtention = ".jpg,.bmp,.gif,.png"; //允许上传文件的后缀名document.getElementById("hfAllowPicSuffix").value; 91 ????????????var extention = fileObj.value.substring(fileObj.value.lastIndexOf(".") + 1).toLowerCase(); 92 ????????????var browserVersion = window.navigator.userAgent.toUpperCase(); 93 ????????????if (allowExtention.indexOf(extention) > -1) { 94 ????????????????if (fileObj.files) {//HTML5实现预览，兼容chrome、火狐7+等 95 ????????????????????if (window.FileReader) { 96 ????????????????????????var reader = new FileReader(); 97 ????????????????????????reader.onload = function (e) { 98 ????????????????????????????document.getElementById(imgPreviewId).setAttribute("src", e.target.result); 99 ????????????????????????}100 ????????????????????????reader.readAsDataURL(fileObj.files[0]);101 ????????????????????} else if (browserVersion.indexOf("SAFARI") > -1) {102 ????????????????????????alert("不支持Safari6.0以下浏览器的图片预览!");103 ????????????????????}104 ????????????????} else if (browserVersion.indexOf("MSIE") > -1) {105 ????????????????????if (browserVersion.indexOf("MSIE 6") > -1) {//ie6106 ????????????????????????document.getElementById(imgPreviewId).setAttribute("src", fileObj.value);107 ????????????????????} else {//ie[7-9]108 ????????????????????????fileObj.select();109 ????????????????????????if (browserVersion.indexOf("MSIE 9") > -1)110 ????????????????????????????fileObj.blur(); //不加上document.selection.createRange().text在ie9会拒绝访问111 ????????????????????????var newPreview = document.getElementById(divPreviewId + "New");112 ????????????????????????if (newPreview == null) {113 ????????????????????????????newPreview = document.createElement("div");114 ????????????????????????????newPreview.setAttribute("id", divPreviewId + "New");115 ????????????????????????????newPreview.style.width = document.getElementById(imgPreviewId).width + "px";116 ????????????????????????????newPreview.style.height = document.getElementById(imgPreviewId).height + "px";117 ????????????????????????????newPreview.style.border = "solid 1px #d2e2e2";118 ????????????????????????}119 ????????????????????????newPreview.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=‘scale‘,src=‘" + document.selection.createRange().text + "‘)";120 ????????????????????????var tempDivPreview = document.getElementById(divPreviewId);121 ????????????????????????tempDivPreview.parentNode.insertBefore(newPreview, tempDivPreview);122 ????????????????????????tempDivPreview.style.display = "none";123 ????????????????????}124 ????????????????} else if (browserVersion.indexOf("FIREFOX") > -1) {//firefox125 ????????????????????var firefoxVersion = parseFloat(browserVersion.toLowerCase().match(/firefox\/([\d.]+)/)[1]);126 ????????????????????if (firefoxVersion < 7) {//firefox7以下版本127 ????????????????????????document.getElementById(imgPreviewId).setAttribute("src", fileObj.files[0].getAsDataURL());128 ????????????????????} else {//firefox7.0+ ???????????????????129 ????????????????????????document.getElementById(imgPreviewId).setAttribute("src", window.URL.createObjectURL(fileObj.files[0]));130 ????????????????????}131 ????????????????} else {132 ????????????????????document.getElementById(imgPreviewId).setAttribute("src", fileObj.value);133 ????????????????}134 ????????????} else {135 ????????????????alert("仅支持" + allowExtention + "为后缀名的文件!");136 ????????????????fileObj.value = ""; //清空选中文件137 ????????????????if (browserVersion.indexOf("MSIE") > -1) {138 ????????????????????fileObj.select();139 ????????????????????document.selection.clear();140 ????????????????}141 ????????????????fileObj.outerHTML = fileObj.outerHTML;142 ????????????}143 ????????????return fileObj.value; ???//返回路径144 ????????}145 ????</script>146 </html>
upload.php源码：
?1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> ?2 <html xmlns="http://www.w3.org/1999/xhtml"> ?3 <head> ?4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> ?5 <title>上传处理文件</title> ?6 </head> ?7 ??8 <body> ?9 <?php 10 ?11 $gotopage="tu.php"; 12 //var_dump($_FILES["file"]); 13 //array(5) { ["name"]=> string(17) "56e79ea2e1418.jpg" ["type"]=> string(10) "image/jpeg" ["tmp_name"]=> string(43) "C:\Users\asus\AppData\Local\Temp\phpD07.tmp" ["error"]=> int(0) ["size"]=> int(454445) } ?14 //1.限制文件的类型，防止注入php或其他文件，提升安全 15 //2.限制文件的大小，减少内存压力 16 //3.防止文件名重复，提升用户体验 17 ????//方法一： ?修改文件名 ???一般为:时间戳+随机数+用户名 18 ????// 方法二:建文件夹 19 ?????20 //4.保存文件 21 ?22 //判断上传的文件是否出错,是的话，返回错误 23 if($_FILES["file"]["error"]) 24 { 25 ????//echo $_FILES["file"]["error"]; ?26 ????header("refresh:10;url=".$gotopage); ?27 ????print(‘上传出错，错误代码:‘.$_FILES["file"]["error"].‘，请稍等...<br>10秒后自动跳转。‘); 28 ????echo "<br /><br /><br />"; 29 ????switch ($_FILES["file"]["error"]) 30 ????{ 31 ?????case 1: 32 ?????????echo "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。"; 33 ?????????break; ??34 ?????case 2: 35 ?????????echo "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定"; 36 ?????????break; 37 ?????case 3: 38 ?????????echo "文件只有部分被上传。 "; 39 ?????????break; 40 ?????case 4: 41 ?????????echo "没有文件被上传。 "; 42 ?????????break; ?????43 ?????case 5: 44 ?????????echo "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定"; 45 ?????????break; ?46 ?????case 6: 47 ?????????echo "找不到临时文件夹。PHP 4.3.10 和 PHP 5.0.3 引进。"; 48 ?????????break; ??49 ?????case 7: 50 ?????????echo "文件写入失败。PHP 5.1.0 引进。"; 51 ?????????break; ??52 ???53 ???54 ???} 55 ?????56 ????echo "<br /><br /><br /> 57 ????错误代码解析<br /> 58 ????UPLOAD_ERR_OK:其值为 0，没有错误发生，文件上传成功。<br /> ?59 ????UPLOAD_ERR_INI_SIZE: 其值为 1，上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。<br /> ?60 ????UPLOAD_ERR_FORM_SIZE:其值为 2，上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定<br /> 61 ????UPLOAD_ERR_PARTIAL:其值为 3，文件只有部分被上传。 <br /> 62 ????UPLOAD_ERR_EXTENSION:其值为 4，没有文件被上传。 <br /> 63 ????UPLOAD_ERR_NO_TMP_DIR: 其值为 6，找不到临时文件夹。PHP 4.3.10 和 PHP 5.0.3 引进。<br /> ?64 ????UPLOAD_ERR_CANT_WRITE:其值为 7，文件写入失败。PHP 5.1.0 引进。<br /> 65 ????"; 66 ????????67 } 68 else 69 { 70 ?71 ??echo "Upload: " . $_FILES["file"]["name"] . "<br />"; 72 ??echo "Type: " . $_FILES["file"]["type"] . "<br />"; 73 ??echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />"; 74 ??echo "Stored in: " . $_FILES["file"]["tmp_name"]. "<br /><br /><br />"; 75 ???76 ?77 ????//没有出错 78 ????//加限制条件 79 ????//判断上传文件类型为png或jpg且大小不超过10240000B(10M) 80 ????if(($_FILES["file"]["type"]=="image/png"||$_FILES["file"]["type"]=="image/gif"||$_FILES["file"]["type"]=="image/jpeg")&&$_FILES["file"]["size"]<10240000) 81 ????{ 82 ????????????//防止文件名重复 83 ????????????$filename ="./img/".time()."_".$_FILES["file"]["name"]; 84 ????????????//转码，把utf-8转成gb2312,返回转换后的字符串， 或者在失败时返回 FALSE。 85 ????????????$filename =iconv("UTF-8","gb2312",$filename); 86 ?????????????//检查文件或目录是否存在 87 ????????????if(file_exists($filename)) 88 ????????????{ 89 ????????????????echo"该文件已存在"; 90 ????????????} 91 ????????????else 92 ????????????{ ??93 ????????????????//保存文件, ??move_uploaded_file 将上传的文件移动到新位置 ??94 ????????????????move_uploaded_file($_FILES["file"]["tmp_name"],$filename);//将临时地址移动到指定地址 95 ????????????????header("refresh:5;url=".$gotopage); print(‘上传成功，请稍等...<br>五秒后自动跳转。‘); ????96 ????????????} ????????97 ????} 98 ????else 99 ????{100 ????????//echo"文件类型不对";101 ????????header("refresh:5;url=".$gotopage); print(‘上传失败，你上传的不是图片，请稍等...<br>五秒后自动跳转。‘); ?102 ????}103 }104 ?>105 </body>106 </html>PHP上传图片例子
原文地址：https://www.cnblogs.com/chenjian/p/9748313.html