<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <div class="container"> <form enctype="multipart/form-data" action="upload.php?action=img" method="post" name="imge"> <input value="導入文件" type="file" name="img" id="file" /> <input type="submit" id="imgbut" class="btn" value="上傳圖片" /> </form> </div> </body> </html>
<?php header("Content-Type:text/html;charset=utf-8"); if (isset($_GET["action"]) == "img") { //step 1 使用$_FILES['pic']["error"] 檢查錯誤 if ($_FILES["img"]["error"] > 0) { switch ($_FILES["img"]["error"]) { case 1 : echo "<script type='text/javascript'>alert('上傳的文件超過了 php.ini 中 upload_max_filesize 選項限制的值<br>');history.back();</script>"; break; case 2 : echo "<script type='text/javascript'>alert('上傳文件的大小超過了 HTML 表單中 MAX_FILE_SIZE 選項指定的值');history.back();</script>"; break; case 3 : echo "<script type='text/javascript'>alert('文件只有部分被上傳');history.back();</script>"; break; case 4 : echo "<script type='text/javascript'>alert('沒有文件被上傳');history.back();</script>"; break; default : echo "<script type='text/javascript'>alert('末知錯誤');history.back();</script>"; } exit; } $maxsize = 1000000000; //step 2 使用$_FILES["pic"]["size"] 限制大小 單位字節 2M=2000000 if ($_FILES["img"]["size"] > $maxsize) { echo "<script type='text/javascript'>alert('上傳的文件太大,不能超過{$maxsize}字節');history.back();</script>"; exit; } //step 3 使用$_FILES["pic"]["type"]或是文件的擴展名 限制類型 MIME image/gif image/png gif png jpg $allowtype = array("png", "gif", "jpg", "jpeg"); $arr = explode(".", $_FILES["img"]["name"]); $hz = $arr[count($arr) - 1]; if (!in_array($hz, $allowtype)) { echo "<script type='text/javascript'>alert('這是不容許的類型');history.back();</script>"; exit; } //step 4 將讓傳後的文件名更名 $filepath = "uploads/"; //爲了符合UBB的路徑 $randname = date("Y") . date("m") . date("d") . date("H") . date("i") . date("s") . rand(100, 999) . "." . $hz; //將臨時位置的文件移動到指定的目錄上便可 if (is_uploaded_file($_FILES["img"]["tmp_name"])) { if (move_uploaded_file($_FILES["img"]["tmp_name"], $filepath . $randname)) { echo "<script type='text/javascript'>alert('上傳成功');history.back();</script>"; session_start(); $_SESSION['images'] = $filepath . $randname; //echo $_SESSION['images']; } else { echo "<script type='text/javascript'>alert('上傳失敗');history.back();</script>"; } } else { echo "<script type='text/javascript'>alert('不是一個上傳文件');history.back();</script>"; } } ?>