Functions php files

• fopen
  Open a file
  http://php.net/manual/en/function.fopen.php
  http://www.homeandlearn.co.uk/php/php10p3.html

Examples :
https://gist.github.com/4250723

Mode Meaning r Use this to read a file only. The pointer is set to the start of the file. r+ Use this to read and write to a file. The pointer is set to the start of the file. w Use this to write to a file only. It will erase the entire contents of the file you have open. If no file exists with your chosen name, then it will create one for you w+ Same as "w", but used to read and write. a Use this to write to a file only, and append data to the end of the file. Doesn't erase contents, in other words. a+ Same as "a", but with read access as well. x Create a file to write only. But gives you a special warning called E_WARNING. x+ Same as x but with read access as well. t In Windows, a line break is \r\n. The t converts \n line breaks created on other Operating Systems so that they are readable with Windows b Force PHP to open the file in binary mode.