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PHP课堂--实验4

PHP课堂--实验4

 

 

实验目的:

掌握PHP中函数的基本应用,注意参数传递过程中传值和传引用的区别

掌握PHP中表单的基本应用,包括get和post两种方式,注意这两种方式的区别

掌握PHP中文件的打开,关闭和上传操作

掌握PHP中cookie和session的基本使用

 

实验内容:

1.编写一个php动态页面,在html标记中用先嵌入一段php代码,给变量$x赋一个文本数值;然后把$x的数值作为一个html表单中的文本型输入框的value属性值。

提示:

使用:

 

2、使用form进行不同页面动态交互(两种不同方式,get和post的区别,)

建立前后2个页面,通过使用form和sumbit按钮来实现:将前一页输入框中的值提交给后一页进行显示。

提示:

1)前页:

页面跳转:   (也可以使用get方法,注意这两种方法的不同)

提交按钮:

2)后页:

显示前一页传来的参数的方法:

 

 

3、使用form进行相同页面动态交互。

使用循环将用户输入的4个数由小到大排序显示。

提示:

本页的动态交互:不需要action,直接:, 再结合$_POST[]数组即可。 

假设我们的提交按钮是:

则通过$_POST[“bt1”]可获得页面的提交情况:

if(isSet($_POST["bt1"]))//已点击了提交按钮,此值=真,否则为假。

 

4、文件上传

提示:

创建一个文件上传表单,注意enctype="multipart/form-data">(表示表单需要二进制数据);

进行文件上传的操作,注意$_FILES变量和参数的使用,文件上传过程中先把文件存放在服务器的临时目录,$_FILES[“file”][“tmp_name”],然后再利用move_uploaded_file()拷贝到指定目录;

提高要求,在文件上传过程中,对于文件类型,文件大小进行限制,如只允许小于100k的文件。

 

5.按照课件上面的cookie和session例子,了解cookie和session的基本用法



1、源代码:exam4_1.php


<?php $x = "Hello world!!!";	?>1.编写一个php动态页面,在html标记中用先嵌入一段php代码,给变量$x赋一个文本数值;然后把$x的数值作为一个html表单中的文本型输入框的value属性值。<input type="text" name="x" size="32" value="<?php echo $x;?>">

2.源代码:exam4_2.php


	
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