.ini files or JSON file format as it is also known as, are very useful format to store stuff in. Especially large arrays. 

Strangely enough there is this nice function to read the file, but no function to write it.

So here is one.

Use it as:  put_ini_file(string $file, array $array)

<?php 
function put_ini_file($file, $array, $i = 0){
  $str="";
  foreach ($array as $k => $v){
    if (is_array($v)){
      $str.=str_repeat(" ",$i*2)."[$k]".PHP_EOL; 
      $str.=put_ini_file("",$v, $i+1);
    }else
      $str.=str_repeat(" ",$i*2)."$k = $v".PHP_EOL; 
  }
 if($file)
    return file_put_contents($file,$str);
  else
    return $str;
}
?>