PHP overview .. 1. what is PHP? 2. what does PHP mean? 3. What is the relationship between versions? 4. can I run different PHP versions at the same time? 5. what is the difference between PHP3 and PHP4? 6. I think I found out what a. PHP is?
2. what does PHP mean?
3. What is the relationship between versions?
4. can I run different PHP versions at the same time?
5. what is the difference between PHP 3 and PHP 4?
6. I think I found a BUG. who should I tell?
1. what is PHP?
Preface to the manual:
PHP is an embedded HTML scripting language. Most of its syntax comes from C, and some PHP features are also used for Java and Perl. This language enables WEB developers to quickly and efficiently write dynamically generated pages.
Here (on the Zend site) is a good PHP introduction written by Stig S her Bakken. In addition, many PHP resources are available for free.
2. what does PHP mean?
What does PHP mean? PHP: Hypertext Preprocessor. this represents confusing many people, because the abbreviation of the first word is itself. This type is short for recursion. Curious people can read the online free computer dictionary for more information
3. What is the relationship between versions?
PHP/FI 2.0 is an earlier version and is no longer supported. PHP 3 is the successor of PHP/FI 2.0, which is better than PHP 2. PHP 4 is the final version (currently) and uses the Zend Engine mechanism.
4. can I run different PHP versions at the same time?
Yes, yes. For more information, see the INSTALL file in the PHP source code release package. Of course, read the related attachments.
5. what is the difference between PHP 3 and PHP 4?
The authors of PHP 4 wrote many articles about this. The following are the most important new features:
Extended API module
General compilation process in UNIX
Universal WEB service interface, supporting multi-threaded WEB servers
Improved syntax
Built-in HTTP session support
Output buffer support
More powerful configuration system
Reference count
For details about these features, see What's new in PHP 4 overview. if you are switching from PHP 3 to PHP 4, you still have to read the relevant attachments.
6. I think I found a bug! Who should I tell?
First, you should check the PHP Bug Database to confirm that this is not a known bug. If it is not found in the database, enter the report form to report the bug. Remember, you must use bugs instead of simply notifying a contact group, because bugs in the database will be assigned a tracking number so that you can return in the future to query the progress of bugs. Bug database can be found at the address below: http://bugs.php.net /.
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