Backend DevelopmentPHP TutorialThe most basic PHP classification query program, php classification query program_PHP tutorialThe most basic PHP classification query program, php classification query program_PHP tutorial
The most basic PHP classification query program, php classification query program
<span>最初级的PHP分类查询程序
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<div align="center"><form action="<?php <span>$_SERVER</span>['PHP_SELF'];?>" method="post"><input type="submit" name="sell" value="智慧销售" /> &<span>nbsp;
</span><input type="submit" name="manager" value="经营管理"/> <input type="submit" name="serve" value="智慧客服"
/> <input type="submit" name="newemployee" value="智慧新员工" /> <<span>input
type</span>="submit" name="development" value="个人发展" /></form>
<?<span>php
</span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['sell'<span>])){
</span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>);
</span><span>if</span>(!<span>$conn</span><span>){
</span><span>die</span>('Could not connect the database!'<span>);
}
</span><span>mysql_query</span>("SET NAMES UTF8"<span>);
</span><span>mysql_query</span>("set character_set_client=utf8"<span>);
</span><span>mysql_query</span>("set character_set_results=utf8"<span>);
</span><span>mysql_select_db</span>("test",<span>$conn</span><span>);
</span><span>$sql</span>="select * from ts1 where name like '%智慧销售%' "<span>;
</span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>);
</span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>;
</span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){
</span><span>echo</span> '<tr height="45px">'<span>;
</span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>;
</span><span>echo</span> '</tr>'<span>;
}
</span><span>echo</span> '</table>'<span>;
</span><span>mysql_close</span>(<span>$conn</span><span>);
}
/ / http://www.pprar.com
</span>?>
<?<span>php
</span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['serve'<span>])){
</span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>);
</span><span>if</span>(!<span>$conn</span><span>){
</span><span>die</span>('Could not connect the database!'<span>);
}
</span><span>mysql_query</span>("SET NAMES UTF8"<span>);
</span><span>mysql_query</span>("set character_set_client=utf8"<span>);
</span><span>mysql_query</span>("set character_set_results=utf8"<span>);
</span><span>mysql_select_db</span>("test",<span>$conn</span><span>);
</span><span>$sql</span>="select * from ts1 where name like '%智慧客服%' "<span>;
</span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>);
</span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>;
</span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){
</span><span>echo</span> '<tr height="45px">'<span>;
</span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>;
</span><span>echo</span> '</tr>'<span>;
}
</span><span>echo</span> '</table>'<span>;
</span><span>mysql_close</span>(<span>$conn</span><span>);
}
</span>?>
<?<span>php
</span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['manager'<span>])){
</span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>);
</span><span>if</span>(!<span>$conn</span><span>){
</span><span>die</span>('Could not connect the database!'<span>);
}
</span><span>mysql_query</span>("SET NAMES UTF8"<span>);
</span><span>mysql_query</span>("set character_set_client=utf8"<span>);
</span><span>mysql_query</span>("set character_set_results=utf8"<span>);
</span><span>mysql_select_db</span>("test",<span>$conn</span><span>);
</span><span>$sql</span>="select * from ts1 where name like '%经营管理%' "<span>;
</span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>);
</span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>;
</span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){
</span><span>echo</span> '<tr height="45px">'<span>;
</span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>;
</span><span>echo</span> '</tr>'<span>;
}
</span><span>echo</span> '</table>'<span>;
</span><span>mysql_close</span>(<span>$conn</span><span>);
}
</span>?>
<?<span>php
</span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['newemployee'<span>])){
</span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>);
</span><span>if</span>(!<span>$conn</span><span>){
</span><span>die</span>('Could not connect the database!'<span>);
}
</span><span>mysql_query</span>("SET NAMES UTF8"<span>);
</span><span>mysql_query</span>("set character_set_client=utf8"<span>);
</span><span>mysql_query</span>("set character_set_results=utf8"<span>);
</span><span>mysql_select_db</span>("test",<span>$conn</span><span>);
</span><span>$sql</span>="select * from ts1 where name like '%智慧新员工%'"<span>;
</span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>);
</span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>;
</span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){
</span><span>echo</span> '<tr height="45px">'<span>;
</span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>;
</span><span>echo</span> '</tr>'<span>;
}
</span><span>echo</span> '</table>'<span>;
</span><span>mysql_close</span>(<span>$conn</span><span>);
}
</span>?>
<?<span>php
</span><span>if</span>(!<span>empty</span>(<span>$_POST</span>['development'<span>])){
</span><span>$conn</span>=<span>mysql_connect</span>("localhost","root","root"<span>);
</span><span>if</span>(!<span>$conn</span><span>){
</span><span>die</span>('Could not connect the database!'<span>);
}
</span><span>mysql_query</span>("SET NAMES UTF8"<span>);
</span><span>mysql_query</span>("set character_set_client=utf8"<span>);
</span><span>mysql_query</span>("set character_set_results=utf8"<span>);
</span><span>mysql_select_db</span>("test",<span>$conn</span><span>);
</span><span>$sql</span>="select * from ts1 where name like '%个人发展%' "<span>;
</span><span>$result</span>=<span>mysql_query</span>(<span>$sql</span><span>);
</span><span>echo</span> '<table height="60%" width="60%" border="1" align="center">'<span>;
</span><span>while</span>(<span>$row</span>=<span>mysql_fetch_assoc</span>(<span>$result</span><span>)){
</span><span>echo</span> '<tr height="45px">'<span>;
</span><span>echo</span> '<td>'.<span>$row</span>['id'].'</td>'.'<td>'.<span>$row</span>['name'].'</td>'.'<td>'.<span>$row</span>['image'].'</td>'<span>;
</span><span>echo</span> '</tr>'<span>;
}
</span><span>echo</span> '</table>'<span>;
</span><span>mysql_close</span>(<span>$conn</span><span>);
}
</span>?>
</div>
</body>
</html>
First learn the basics of PHP, then go to Baidu to check the principles of the functions you need, and then experiment. After the experiment is successful, use it on the website.
After completing these four steps, you will have learned a function of this technology.
Most people who can’t learn PHP keep repeating the first step!
The tutorials on w3school are very basic and easy to understand. It is recommended to read it first. Then you can watch the video tutorial of php100. This video tutorial is very detailed and easy to understand, and it contains a lot of knowledge points. I also learned it by watching this.
Again, watching tutorials is just memorizing multiplication tables. Students who only know multiplication tables will never do word problems. Only by using it can real learning be achieved!
The simplest program is this:
echo 'Hello, world!';
?>
Download PHP can be downloaded at www.php.net , select the binary code under windows, you can download the installation package and ZIP package. I like ZIP package, just unzip it to a folder, such as c:\php\. Double-click the PHP file saved above (I edited it with Notepad) and select the link to c:\php\php.exe you just unlocked.
The Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AMWhat’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.
PHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AMPHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.
PHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AMPHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.
PHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AMPHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.
Choosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AMPHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.
PHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AMPHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.
PHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AMPHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip
How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AMPHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.
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DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
