diff --git "a/\345\220\264\351\207\217/20220525--\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237+\347\231\273\345\275\225/index.php" "b/\345\220\264\351\207\217/20220525--\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237+\347\231\273\345\275\225/index.php"
index e27e40277c103e5562a830f009142135700c7692..311b1a824dd72818cd9fd7bfc6c4bdcffb4c835f 100644
--- "a/\345\220\264\351\207\217/20220525--\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237+\347\231\273\345\275\225/index.php"
+++ "b/\345\220\264\351\207\217/20220525--\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237+\347\231\273\345\275\225/index.php"
@@ -1,5 +1,5 @@
 <?php
-session_start();
+session_start();//
 include_once('conn.php');
 $username='';
 empty($_SESSION['username'])?$username=$_COOKIE['username']:$username=$_SESSION['username'];
diff --git "a/\345\220\264\351\207\217/20220613--PHP\345\212\250\346\200\201\347\275\221\347\253\231\345\274\200\345\217\221\347\254\254\344\272\214\346\254\241\345\244\247\344\275\234\344\270\232.doc" "b/\345\220\264\351\207\217/20220613--PHP\345\212\250\346\200\201\347\275\221\347\253\231\345\274\200\345\217\221\347\254\254\344\272\214\346\254\241\345\244\247\344\275\234\344\270\232.doc"
new file mode 100644
index 0000000000000000000000000000000000000000..19a32e9d0094c7ad65f2b20463b2991a60e20244
Binary files /dev/null and "b/\345\220\264\351\207\217/20220613--PHP\345\212\250\346\200\201\347\275\221\347\253\231\345\274\200\345\217\221\347\254\254\344\272\214\346\254\241\345\244\247\344\275\234\344\270\232.doc" differ
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/.gitignore" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/.gitignore"
new file mode 100644
index 0000000000000000000000000000000000000000..35410cacdc5e87f985c93a96520f5e11a5c822e4
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/.gitignore"
@@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/modules.xml" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/modules.xml"
new file mode 100644
index 0000000000000000000000000000000000000000..328ac4a8b750f1997d3fb816622e9d9f732e41e7
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/modules.xml"
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/untitled5.iml" filepath="$PROJECT_DIR$/.idea/untitled5.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/untitled5.iml" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/untitled5.iml"
new file mode 100644
index 0000000000000000000000000000000000000000..c956989b29ad0767edc6cf3a202545927c3d1e76
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/.idea/untitled5.iml"
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/add.php" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/add.php"
new file mode 100644
index 0000000000000000000000000000000000000000..89115906f7286a13e7391ceb6c3b1574cbc9df88
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/add.php"
@@ -0,0 +1,22 @@
+
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>新增</title>
+</head>
+<body>
+<form action="add2.php" method="post" enctype="multipart/form-data">
+    <table border="1">
+        <tr align="center"><td>图书名称：</td><td><input type="text" name="book_name"></td></tr>
+        <tr align="center"><td>国际标准书号：</td><td><input type="text" name="isbn"></td></tr>
+        <tr align="center"><td>作者：</td><td><input type="text" name="author"></td></tr>
+        <tr align="center"><td colspan="2"><input type="submit" name="submit">   <input type="button" value="取消" onclick="location.href='index.php'"></td></tr>
+    </table>
+</form>
+</body>
+</html>
+
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/add2.php" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/add2.php"
new file mode 100644
index 0000000000000000000000000000000000000000..c8e6d97ce2784d6f4882ecb72033cb723e9a455a
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/add2.php"
@@ -0,0 +1,12 @@
+<?php
+$conn = mysqli_connect('localhost', 'root', 'root', 'school') or die('连接失败');
+$book_name = $_POST['book_name'];
+$isbn = $_POST['isbn'];
+$author = $_POST['author'];
+$add = "insert into book values (null,'$book_name','$isbn','$author');";
+$query = mysqli_query($conn, $add);
+if (empty($query)){
+    echo "<script>alert('新增失败！');location.href='".$_SERVER["HTTP_REFERER"]."';</script>";
+}else{
+    echo "<script>alert('新增成功！');location.href='".$_SERVER["HTTP_REFERER"]."';</script>";
+}
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/delete.php" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/delete.php"
new file mode 100644
index 0000000000000000000000000000000000000000..7742e5028dfbbb823e426a4672a874c278294ea3
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/delete.php"
@@ -0,0 +1,11 @@
+<?php
+$conn=mysqli_connect('localhost','root','root','school') or die('连接失败');
+    $book_id=$_GET['book_id'];
+    echo $book_id;
+    $delete="delete from book where book_id=$book_id ";
+    $mq=mysqli_query($conn,$delete);
+    if (empty($mq)){
+        echo "<script>alert('删除失败！');location.href='".$_SERVER["HTTP_REFERER"]."';</script>";
+    }else{
+        echo "<script>alert('删除成功！');location.href='".$_SERVER["HTTP_REFERER"]."';</script>";
+    }
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/index.php" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/index.php"
new file mode 100644
index 0000000000000000000000000000000000000000..2e357a0f4f4a09541afe623a9fdd89758bbf18d7
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/index.php"
@@ -0,0 +1,49 @@
+<?php
+    $conn=mysqli_connect('localhost','root','root','school') or die('连接失败');
+    $book_name=$_POST['book_name'];
+    if (empty($book_name)){
+        $sql="select * from book;";
+    }else{
+        $sql="select * from book where book_name like '%$book_name%';";
+    }
+    $mq=mysqli_query($conn,$sql);
+        while($rows=mysqli_fetch_assoc($mq)){
+            $books[]=$rows;
+    }
+
+//var_dump($books);
+?>
+<!doctype html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>Document</title>
+</head>
+<body>
+    <a href="add.php">新增</a>
+    <table border="1">
+        <tr>
+            <th>图书编号</th>
+            <th>图书名称</th>
+            <th>国际标准书号</th>
+            <th>作者</th>
+            <th>操作</th>
+        </tr>
+        <?php
+            foreach ($books as $key) {?>
+                <tr>
+                    <td><?php echo $key['book_id'] ?></td>
+                    <td><?php echo $key['book_name'] ?></td>
+                    <td><?php echo $key['isbn'] ?></td>
+                    <td><?php echo $key['author'] ?></td>
+                    <td><a href="delete.php?book_id=<?php echo $key['book_id']?>">删除</a></td>
+                </tr>
+                <?php
+        }
+        ?>
+    </table>
+</body>
+</html>
diff --git "a/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/select.php" "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/select.php"
new file mode 100644
index 0000000000000000000000000000000000000000..a06ae64b2aba25fd6bcdfe2d614281b30e57bac0
--- /dev/null
+++ "b/\345\220\264\351\207\217/20220614--php\347\273\223\350\257\276\345\244\247\344\275\234\344\270\232/select.php"
@@ -0,0 +1,20 @@
+
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>查询</title>
+</head>
+<body>
+<form action="index.php" method="post" enctype="multipart/form-data">
+    <table>
+        <tr>
+            <td>请输入要查询的书名：<input type="text" name="book_name"><input type="submit" value="查询"></td>
+        </tr>
+    </table>
+</form>
+</body>
+</html>