php上传图片客户端和服务器端实现方法
这篇文章主要介绍了php上传图片客户端和服务器端实现方法,涉及php操作文件的技巧,涉及图片后缀验证、文件重命名等常用方法,具有一定参考借鉴价值,需要的朋友可以参考下。
本文实例讲述了php上传图片客户端和服务器端实现方法,分享给大家供大家参考,具体如下:
前台表单代码
- <form name="form1" method="post" action="admin_upfile.php" enctype="multipart/form-data">
- <input type="file" name="pic">
- <input type="submit" name="Submit" value="开始上传" class="button">
- </form>
后端php代码
- <?php
- //这里上传 $upsize判断上传文件的大小
- $uppath = "/attached/"; //文件上传路径
- //转换根目录的路径
- if (strpos($uppath, "/") == 0)
- {
- $i = 0;
- $thpath = $_SERVER["SCRIPT_NAME"];
- $thpath = substr($thpath, 1, strlen($thpath));
- while (strripos($thpath, "/") !== false)
- {
- $thpath = substr($thpath, strpos($thpath, "/") + 1, strlen($thpath));
- $i = ++$i;
- }
- $pp = "";
- for ($j = 0; $j < $i; ++$j)
- {
- $pp .= "../";
- }
- $uppaths = $pp . substr($uppath, 1, strlen($thpath));
- }
- $filename = date("y-m-d");
- if (is_dir($uppaths . $filename) != TRUE)
- mkdir($uppaths . $filename, 0777);
- $f = $_FILES['pic'];
- if ($f["type"] != "image/gif" && $f["type"] != "image/pjpeg" && $f["type"] != "image/jpeg" && $f["type"] != "image/x-png")
- {
- echo "<script>alert('只能上传图片格式的文件');window.close()</script>";
- return false;
- }
- //获得文件扩展名
- $temp_arr = explode(".", $f["name"]);
- $file_ext = array_pop($temp_arr);
- $file_ext = trim($file_ext);
- $file_ext = strtolower($file_ext);
- //新文件名
- $new_file_name = md5(date("YmdHis")) . '.' . $file_ext;
- echo $dest = $uppaths . $filename . "/" . date("ymdhis") . "_" .
- $new_file_name; //设置文件名为日期加上文件名避免重复 上传目录
- echo $dest1 = $uppath . $filename . "/" . date("ymdhis") . "_" .
- $new_file_name; //设置文件名为日期加上文件名避免重复
- $r = move_uploaded_file($f['tmp_name'], $dest);
- ?>