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PHP extensions?

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wolf73

Programmer
Feb 12, 2006
93
CA
Hi,

What are PHP extensions? How do they work. i host most of my sites on a hosting company server, how can I find out out if they have installed all the extensions?

Thanks
 
php extensions are pre-loaded classes that allow php to do extra things, outside its core functions. examples include:

interacting with a mysql or other database (some classes are built in to php at compile time but as of php 5 mysql is no longer compiled in)
extending the maths functionality
providing graphing and other graphic capabilities

phpinfo(); will provide a screen dump of lots of useful information about your php installation as well as all the loaded extensions. some hosts also allow you to upload your own instances of php (as a cgi) in which case you can control your own extensions through local php.ini files.

 
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