4. Can I run different versions of PHP 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?
wrote in the preface to the Handbook:
PHP is an embedded HTML scripting language. Most of its syntax comes from C, and a subset of PHP features are borrowed from Java and Perl. The purpose of this language is to enable Web developers to write dynamically generated pages quickly and efficiently.
here (on the Zend site) is a good introduction to PHP written by Stig s 鎡 her Bakken. Also, a lot of PHP resources are available free of charge.
2. What does PHP stand for?
What does
PHP represent? PHP: Hypertext Preprocessor. Such a representation confuses a lot of people, because the abbreviated first word is the abbreviation itself. This type of shorthand is called recursive shorthand. Curious people can read the online free computer dictionary For more information
3. What is the relationship between the versions?
PHP/FI 2.0 is an earlier version and is now no longer supported. PHP 3 is a PHP/FI 2.0 successor, better than PHP 2. PHP 4 is the final version (currently), and it uses the Zend engine mechanism.
4. Can I run different versions of PHP at the same time?
Yes, you can. See the INSTALL file in the PHP source code release package for more information. Of course, also need to read the relevant attachment.
5. What is the difference between PHP 3 and PHP 4?
The authors of
PHP 4 wrote a number of articles about this. The following is one of the most important new features:
Extended API Module
the common compiler process under UNIX
Universal Web Service interface, supporting multi-threaded Web server
Improved Syntax
built-in HTTP session support
Output buffering Support
a more powerful configuration system
Reference Count
If you want to see the details of these features, see What's New in PHP 4 overview If you're switching from PHP 3 to PHP 4, you'll also need to read the relevant attachments.
6. I think I found a bug!. Who am I supposed to tell?
you should first check the PHP bug Database to make sure it's not a known bug. If you don't find it in the database, fill out the report form to report the bug. Remember, be sure to use a bug instead of simply notifying a mail group, because the bug in the database allocates a tracking number so that you can return later to inquire about the progress of the bug. The bug database can be found at the following address: http://bugs.php.net/.
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