CodeIgniter - Common Functions

Common Functions

CodeIgniter  library  functions  and  helper  functions  need  to  be  initialized  before  they  are used but there are some common functions, which do not need to be initialized.

These common functions and their descriptions are given below.

Given below is an example, which demonstrates all of the above functions.

Example

Here  we  have  created  only  one  controller  in  which  we  will  use the  above  functions.  Copy the  below  given  code  and  save  it  at application/controller/CommonFun_Controller.php.

<?php

class  CommonFun_Controller  extends  CI_Controller  {

public  function  index()

{

set_status_header(200); echo  is_php('5.3')."<br>";

var_dump(is_really_writable('./Form.php')); echo  config_item('language')."<br>";

echo  remove_invisible_characters('This  is  a  &zwnj;test','UTF-

8')."<br>";

$str  =  '<  This  >  is  \'  a  "  test  &  string'; echo  html_escape($str)."<br>";

echo  "is_https():".var_dump(is_https())."<br>";

echo  "is_cli():".var_dump(is_cli())."<br>"; var_dump(function_usable('test'))."<br>";

echo  "get_mimes():".print_r(get_mimes())."<br>";

}

public  function  test(){  echo  "Test  function";

}

}

?>

Change  the  routes.php  file  at  application/config/routes.php  to  add  route  for  the  above controller and add the following line at the end of the file.

$route['commonfunctions']  =  'CommonFun_Controller';

Type the following URL in the address bar of your browser to execute the example.

http://yoursite.com/index.php/commonfunctions