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Introduction to PHP development-implementing forum posting function

黄舟

Mar 23, 2017 am 10:02 AM

When it comes to PHP, everyone knows that it is used to build websites. So let’s implement a simple page form submission!

In the last section we talked about the installation of the PHP development environment and the implementation of a basic Hello php program. The hello php program is an introduction. You just see it right in front of you. A road leading to incomparable light, so let’s set foot on this road today!

#1. First enter the www directory of Wamp. In order to facilitate management, we create a new demo1 directory. Create a new text document in this directory and rename it test.html. The code ：

<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf8"/>
<title>测试</title>
</head>

<body>
<form method="post" action="test.php">
<p>This is a program.</p>
<p>标题：<input type="text" name="title"></p>
<p>内容：<textarea name="content"></textarea></p>
<input type="submit" value="提交">
</form>
</body>

</html>

This is a simple html page, if you don’t know about html If you are familiar with it, you can refer to www.w3school.com.cn/, which has a detailed syntax introduction and online debugging function. I personally think it is a very good learning platform.

Here you can see that there is a form. The submission method of the form is post and is submitted to the test.php page. Obviously we need to implement a test.php code later. We first enter the browser to access: localhost/demo1/test.html, we see the page as follows:

##You see what the web pages we usually visit look like, but they are indeed a bit uglier, but that doesn’t matter, we focus on implementing technology and functions! Read on.

2. Create a new test.php file and paste the code directly:

<?php

$title = $_POST[&#39;title&#39;];
$content = $_POST["content"];

file_put_contents("data.txt",$title.",".$content."\n",FILE_APPEND);

echo "<a href=&#39;test.html&#39;>继续添加</a>";
echo "<a href=&#39;show.php&#39;>查看</a>";

?>

The first two lines obtain the data of the title and content fields posted by the form and save them in the $title and $content variables. , and then call the file_put_contents method to save the data in the data.txt file. The next two lines add two jump links, continue to add jumps back to the page where we fill out the form, and when viewing, jump to the show.php page.

3、show.php

## The function of the show.php page is to read the data from data.txt and display it on the page:

<?php
$content = file_get_contents("data.txt");

//echo $content;
echo str_replace("\n", "<br>", $content);
?>

The first line of code reads the data in data.txt into the variable $content , and then displayed on the page. However, since we use the newline character \n between each piece of data when saving the data, and the line breaks are
in html, we replace all \n with
that can be parsed correctly by html. .

##4. Test

Visit the localhost/demo1/test.html page, fill in the title and content, and you can successfully submit the data and view it.

Think about it, is this how we usually post in forums online? , of course this is just an introduction. If you want to realize the functions of the forum, you'd better study hard. After all, you are just on the road to success!

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