diff --git "a/\345\217\266\346\200\235\346\200\235/200220518-\346\226\207\344\273\266\344\270\212\344\274\240.md" "b/\345\217\266\346\200\235\346\200\235/200220518-\346\226\207\344\273\266\344\270\212\344\274\240.md"
new file mode 100644
index 0000000000000000000000000000000000000000..306771ea4b5cec8db01b59a2f1a2b4c02e0e14de
--- /dev/null
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@@ -0,0 +1,49 @@
+# 练习
+
+```php
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+<form action="upload.php" method="post" enctype="multipart/form-data">
+    请选择你要上传的文件<input type="file" name="myfile">
+    <br>
+    <input type="submit" value="上传">
+</form>
+</body>
+</html>
+```
+
+```php
+<?php
+$error = $_FILES['myfile']['error'];
+if ($error==0){ //判断文件是否传入成功
+    echo "文件传入成功"."<br>";
+    define("SIZE",1024*1024);
+    $size=$_FILES['myfile']['size']; //获取文件大小
+    if ($size<=SIZE){ //判断文件大小
+        echo "上传的文件大小合适";"<br>";
+        $arr=array("pdf","word");//上传的文件类型
+        $name=$_FILES['myfile']["name"];//获取文件类型
+        $nameArr=explode(".",$name);
+        $last=end($nameArr);
+        $a=in_array($last,$arr);
+        if ($a===true){ //判断文件类型
+            echo "允许上传的文件类型";"<br>";
+        }else{
+            echo "不允许上传的文件类型";
+            "<br>";
+        }
+    }else{
+        echo "上传的文件太大";
+        "<br>";
+    }
+}else{
+    echo "文件上传失败";
+    "<br>";
+}
+```
+
