The main problems encountered in simply learning PHP_PHP tutorial

As of today, the first website written in PHP is almost ready. All functions of the backend part are completed at noon, which means that it can be used for other websites in the future. There is no need to spend too much effort on writing. Now it is simple. Write about the main problems I encountered during the month of learning PHP.

Question 1: Environment combination

The most classic combination of PHP is of course LAMP (Linux+Apache+MySQL+PHP), but I don’t have the conditions and energy to do Linux, so I use Windows 2003 instead of Linux Yes, I am debugging it myself. It is not a server, so it does not require sufficient performance.

My machine itself is a Win2003+IIS+Framework environment that can run ASP and .net, and it is equipped with jdk+tomcat+oracle and can also run jsp. I planned to install apache and mysql without damaging these environments. , but there are many difficulties. .

So I gave up the jsp environment and used ghost to back up the asp environment. I deleted IIS and reinstalled the PHP environment. The environment is still very good. I can easily find the tutorial on Baidu and follow it to install Apache+PHP. +MySQL+PHPMyAdmin, Zend is not installed, I will talk about it later when I study in depth. I have not studied how to understand how there are different paths running on different ports when there are multiple websites, so I don’t care about it for now. Let’s run on port 80 now. The environment is debugged. After I backed up a ghost, the PHP environment was successfully set up.

Problem 2: Blank lines on the page caused by marking BOM of utf-8 encoded files

This problem was encountered before when I was learning xhtml+css. At that time, it was because of the document declaration type It was caused by adding other code in front or not writing the document declaration type xhtml1.0 but using w3c standards to make the page. At first I thought it was also a problem caused by writing require in front of the document declaration. Later, after repeated debugging, I found that it was not that simple. Later I searched a lot on Baidu about the problem of blank lines caused by require. An expert mentioned that you need to use ctrl+j in Dreamweaver to remove the utf-8 encoded BOM. I didn’t understand what the BOM was at the time. Just remove it if you say it. It is indeed solved. Problem, this level has been passed, but there is still a problem with utf-8 later, which is also related to this.

Question 3: Checkbox value problem under PHP

This is the only inconvenient thing I found in PHP. Unlike ASP, the values ​​of all checkboxes with the same name are stored in a set. PHP can only take the value of the last checkbox in the same name, which is very inconvenient when querying multiple data where in (aa, bb, cc, dd). It can only be implemented using js + a hidden input method. Although it is a little troublesome, but It's not a big problem, it can be solved easily. I checked online and found that this is the only way to solve it!

Question 4: The problem of transferring the Access library to MySQL

After all, the database has been designed, and it is very troublesome to create a table in PHPMyAdmin. Simply find a software to transfer the database directly, and still It's good that I found various useful software. However, the interface is all in English and I can't remember the name. I'll go to the company tomorrow to have a look and then upload it. The library was easily transferred, but my hands are very weak. I saw the data in MySQL. There is a folder with the same name as the database I created. I thought that with this folder, I would not need to build or delete the database. On a whim, I deleted all the useless ones. But the problem came that PHPMyAdmin could not connect to the database. This is easy to solve. Reinstalling MySQL once solved the problem, but I switched back to the ASP environment without backing up. When I switched back, MySQL had a big problem. Reinstalling didn't work. I searched on Baidu and finally found csdn The talented person gave the answer "Take libmysql.dll and php5ts.dll to system32" to solve the problem.

Problem 5: NTFS permission problem.

This problem has also appeared on ASP, but in the PHP environment, I didn’t think much about it, so I was stumped all morning and found that this problem was on a friend’s server. One day when I was drinking, I happened to meet a buddy who had a problem with building a website in PHP. Then I pretended to be drunk and said that I was very good at PHP. I only learned it for 2 weeks, hahaha, and I gave it to people the next day. Let’s solve the problem. You can’t ignore it even if you’ve already boasted about it. After connecting to the server, it turned out that a MySQL problem was encountered when installing phpcms. The installation could not continue. A search on Baidu found that the key to the problem was an NTFS permissions issue. This is easy to solve. Just add an Internet guest user and it will be solved. I estimate that I will encounter this problem in the future, so it is better to encounter it sooner rather than later. You will know what is going on at the critical moment!

Question 6: Cookies reading and writing issues.

This problem shouldn’t be a big one, but I just got off work that day and didn’t have time to solve it. It was easily solved the next day. I didn’t know much about affirmative statements at the beginning, so I thought $_COOKIE[ "xxx"] can both read and write. It was only when I used it that I found the right way. I just searched for "php cookies writing" on the Internet and the answer came. Just setcookie. It's so simple.

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http://www.bkjia.com/PHPjc/363992.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/363992.htmlTechArticleAs of today, the first website written in PHP is about to be launched. At noon, all the functions of the backend part are completed, which means You can use it when making other websites in the future without spending too much effort on writing...