From 407675b6de896cda103a5be174936b6c74678e16 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A8=E8=8C=97=E5=8D=9A?= <1072852081@qq.com>
Date: Sun, 22 May 2022 21:52:29 +0800
Subject: [PATCH] 11

---
 ...07\344\273\266\344\270\212\344\274\240.md" | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 "\346\235\250\350\214\227\345\215\232/20220522-\346\226\207\344\273\266\344\270\212\344\274\240.md"
diff --git "a/\346\235\250\350\214\227\345\215\232/20220522-\346\226\207\344\273\266\344\270\212\344\274\240.md" "b/\346\235\250\350\214\227\345\215\232/20220522-\346\226\207\344\273\266\344\270\212\344\274\240.md"
new file mode 100644
index 0000000..01fa0c7
--- /dev/null
+++ "b/\346\235\250\350\214\227\345\215\232/20220522-\346\226\207\344\273\266\344\270\212\344\274\240.md"
@@ -0,0 +1,39 @@
+```php
+<?php
+//1、	实现一个文件上传，限制只能上传pdf和word格式，大小为1M以内。
+print_r($_FILES);
+$error = $_FILES['file']['error'];//0
+if ($error==0){//判断文件是否上传成功
+    //判断文件格式
+    $array = array("pdf","docx");//允许上传的文件格式
+    $name = $_FILES['file']['name'];
+    $nameArr = explode(".",$name);
+    $nameArrX = $nameArr[count($nameArr)-1];
+    $result = array_search($nameArrX,$array);//通过值来找键名，找得到返回键名，找不到返回false
+    if ($result===false){
+        echo "文件格式错误，不允许上传！";
+    }else{
+        echo "文件格式正确，允许上传！";
+        define("size",1024*1024);
+        $size = $_FILES['file']['size'];
+        if ($size>size){
+            echo "上传的文件大小超过1Mb无法上传！";
+        }else{
+            echo "文件上传成功！";
+    }
+}
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>文件上传</title>
+</head>
+<body>
+    <form action="20220518.php" method="post" enctype="multipart/form-data">
+        <input type="file" name="file">
+        <br>
+        <input type="submit" value="提交" name="submit">
+    </form>
+</body>
+</html>
+```
\ No newline at end of file
-- 
Gitee

