Create README.md

Create README.md

README.md

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+# maxmemphp
+Determine the maximum available memory on the server using php
+## Foreword:
+_Many unfortunately today do not consider php as a language for writing console applications, almost all of the pupils code on it WEB because of what PHP imposes a number of restrictions related to WEB, I once had a task when I was writing a CLS application, and I needed to determine how much now on the server of available memory ... After spending about 48 hours on Google, I was upset and found out that PHP can not do this routinely._
+
+_Therefore, I had to write a small code that would return free memory on the server_
+
+## System requirements:
+**Will only work in FreeBSD x64**
+## Installation:
+
+**Step 1**
+To install, simply download the files to your computer/server 
+>git clone https://github.com/StasToken/maxmemphp.git
+
+**Step 2**
+Go to the folder with the downloaded files
+>cd ./maxmemphp
+
+**Step 3**
+Execute the following commands in the folder with the downloaded files
+> phpize
+
+>./configure
+
+>make
+
+>make install
+
+**Step 4**
+
+After these actions, a file will appear in the folder with the libraries to your php _system_available_memory.so_ 
+
+**Step 5**
+
+It only remains to connect it to your php.ini 
+
+_hint:_
+
+To quickly find your php.ini execute in the terminal
+> php -i | grep php.ini
+
+In the answer there will be something like:
+
+>Configuration File (php.ini) Path => /etc/php/7.0/cli
+>Loaded Configuration File => /etc/php/7.0/cli/php.ini
+
+Actually _/etc/php/7.0/cli/php.ini_ and tells us where to look for the file
+
+We add in php.ini
+>extension=system_available_memory.so 
+
+Actually on this installation is finished
+
+## Example of use:
+
+```
+<?php
+$free_memory_server=system_available_memory(); // Return unallocated memory on the server in bytes (int)
+echo $free_memory_server; // Will output something like 765834568
+?>
+```
+
+### What's next
+
+I plan to add support for other platforms - maybe even get my hands on it for WIndows but when I do it (and I'll do it at all) I have no idea .... But you can always help me :)