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PHP Overview._PHP Tutorial
- WBOYOriginal
- 2016-07-21 16:10:23771browse
1. What is PHP?
2. What does PHP stand for?
3. What is the relationship between the versions?
4. Can I run different versions of PHP at the same time?
5. PHP 3 What is the difference from PHP 4?
6. I think I found a BUG, who should I tell?
1. What is PHP?
In the preface of the manual it is written:
PHP is a An embedded HTML scripting language. Most of its syntax is derived from C, and some PHP features are borrowed from Java and Perl. The purpose of this language is to allow WEB developers to write dynamically generated pages quickly and efficiently.
Here (on the Zend site) is a good introduction to PHP by Stig Sher Bakken. Also, many PHP resources are available for free.
2. What does PHP stand for?
What does PHP stand for? PHP: Hypertext Preprocessor. This representation confuses many people because the first word of the abbreviation is the abbreviation itself. This type of shorthand is called recursive shorthand. Curious people can check out the Free Online Computer Dictionary for more information
3. What is the relationship between the versions?
PHP/FI 2.0 is an early version and it is no longer supported. PHP 3 is the successor of PHP/FI 2.0 and is better than PHP 2. PHP 4 is the final version (for now), which uses the Zend engine mechanism.
4. Can I run different versions of PHP at the same time?
Yes, I can. See the INSTALL file in the PHP source code distribution package for details. Of course, also read the relevant attachments.
5. What is the difference between PHP 3 and PHP 4?
The authors of the PHP 4 book have written many articles about this. Here are the most important new features:
Extended API module
Universal compilation process under UNIX
Universal WEB service interface, supporting multi-threaded WEB server
Improved syntax
Built-in HTTP session support
Output buffering support
More powerful configuration system
Reference counting
If you want to see the details of these features, please refer to What's new in PHP 4 overview If you are switching from PHP 3 to PHP 4, you must also read the relevant attachments.
6. I think I found a bug! Who should I tell?
You should first check the PHP Bug Database to make sure this is not a known bug. If it is not found in the database, then fill out the report form to report the bug. Remember, be sure to report bugs rather than simply reporting them to a mailing list, because the bug will be assigned a tracking number in the database so that you can return in the future to check the progress of the bug. The bug database can be found at the following address: http://bugs.php.net/.