Get information about php [duplicate] - php

This question already has answers here:
Where does phpinfo() get its info?
(5 answers)
Closed 2 years ago.
I just started with programing in PHP
And i have a problem:
I'm just experimenting and discovering the language. I tried compressing a string and display the output. I get an some zlib error. I am just wondering if there is a function that returns information about extensions?

You should use
phpinfo();
to display the PHP configuration.

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This is a very weird question that I cannot see asked on this site but how could I just have PHP download a file (say it was a png file) and convert it to having no file extension at all? Before you ask why are you doing this, it's difficult to explain and I would just like to know if it is even possible to do this.
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This is my demo url
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Can we make EXE equivalent for PHP code so that the code can be protected? [duplicate]

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Best solution to protect PHP code without encryption
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Not sure if this has been discussed before.
I was looking for a solution that can protect the PHP code.
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How to make PHP application working multi-threaded? [duplicate]

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Closed 11 years ago.
Possible Duplicate:
Multithreading/Parallel Processing in PHP
I need to make application which work 10 simultaneously like multi-threading .
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http://www.php.net/manual/en/function.pcntl-fork.php

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