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+--- Forum: Libraries & Helpers (https://forum.codeigniter.com/forumdisplay.php?fid=11)
+--- Thread: a couple of potentially useful helpers (/showthread.php?tid=32)
a couple of potentially useful helpers - Hobbes - 10-24-2014
These two helpers are a couple i use in my projects. Not sure if anyone will find them useful or not, but thought i would share them just in case.
the first one is an alias function for both the php functions is_null() and empty()
path/file name: application/helpers/variable_helper.php
PHP Code:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
if (! function_exists('is_null_or_empty'))
{
/**
* this function combines the is_null() and empty() php functions into one check instead of two
*
* @access public
* @param var mixed
* @return boolean
*/
function is_null_or_empty($var)
{
if (is_null($var) OR empty($var))
{
return TRUE;
}
else
{
return FALSE;
}
}
}
the next one contains two files. a config file and a helper file. It converts html to bbcode and bbcode to html.
config file:
in application/config/autoload.php add the below config file to your autoload config array.
path/file name: application/config/bbcode.php
PHP Code:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/*
| -------------------------------------------------------------------
| BBCODE
| -------------------------------------------------------------------
| $config['bbcode'] - an array containing the allowable bbcode tags.
|
| $config['htmlcode'] - an array containing the bbcode's html equivalent
|
*/
$config['bbcode'] = array(
'<',
'>',
'[list]',
'[*]',
'[/list]',
'[img]',
'[/img',
'[b]',
'[/b]',
'[u]',
'[/u]',
'[i]',
'[/i]',
'[color="',
'[/color]',
'[size="',
'[/size]',
'[url="',
'[/url]',
'[mail="',
'[/mail]',
'[code]',
'[/code]',
'[quote]',
'[/quote]',
'"]'
);
$config['htmlcode'] = array(
'<',
'>',
'<ul>',
'<li>',
'</ul>',
'<img src="',
'">',
'<b>',
'</b>',
'<u>',
'</u>',
'<i>',
'</i>',
'<span style="color:',
'</span>',
'<span style="font-size:',
'</span>',
'<a href="',
'</a>',
'<a href="mailto:',
'</a>',
'<code>',
'</code>',
'<blockquote>',
'</blockquote>',
'">'
);
add the below file to your autoload helpers array.
path/file name: application/helpers/bbcode_helper.php
PHP Code:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
if (! function_exists('bb2html'))
{
function bb2html($text)
{
$CI =& get_instance();
$bbcode = $CI->config->item('bbcode');
$htmlcode = $CI->config->item('htmlcode');
$j = count($bbcode);
$newtext = $text;
for ($i = 0; $i < $j; $i++)
{
$newtext = str_replace($bbcode[$i], $htmlcode[$i], $newtext);
}
$newtext = xss_clean($newtext);
$newtext = nl2br($newtext);//second pass
return $newtext;
}
}
if (! function_exists('html2bb'))
{
function html2bb($text)
{
$CI =& get_instance();
$bbcode = $CI->config->item('bbcode');
$htmlcode = $CI->config->item('htmlcode');
$j = count($bbcode);
$newtext = $text;
for ($i = 0; $i < $j; $i++)
{
$newtext = str_replace($htmlcode[$i], $bbcode[$i], $newtext);
}
$newtext = xss_clean($newtext);
return $newtext;
}
}
well there you go, hopefully someone finds them useful
RE: a couple of potentially useful helpers - Ivan's - 10-26-2014
This helpers is very useful For me. Thanks
RE: a couple of potentially useful helpers - Hobbes - 10-27-2014
glad you could use them.
RE: a couple of potentially useful helpers - Narf - 10-27-2014
You don't need is_null_or_empty(), empty() will return TRUE for NULLs.
RE: a couple of potentially useful helpers - marcogmonteiro - 10-31-2014
First helper is kinda pointless.
RE: a couple of potentially useful helpers - Hobbes - 10-31-2014
i created that helper quite awhile ago when i was getting errors passing nulls into the empty function. It was quite irritating, so basically it was put in as a work around for the problem. Still to this day not sure why i was getting that error with the empty function but yeah, that is why i wrote it.
RE: a couple of potentially useful helpers - Narf - 10-31-2014
(10-31-2014, 07:59 AM)Hobbes Wrote: i created that helper quite awhile ago when i was getting errors passing nulls into the empty function. It was quite irritating, so basically it was put in as a work around for the problem. Still to this day not sure why i was getting that error with the empty function but yeah, that is why i wrote it.
You might've had problems with passing function return values directly to empty():
PHP Code:
// This only works on PHP 5.5+
empty(foo());
This has nothing to do with nulls though.
RE: a couple of potentially useful helpers - Avenirer - 10-31-2014
Maybe the problem then (and now) was that what is considered an empty variable is not necessarily a null one.
Maybe a better function would be is_empty_and_null($var).
RE: a couple of potentially useful helpers - Narf - 11-01-2014
(10-31-2014, 12:47 PM)Avenirer Wrote: Maybe the problem then (and now) was that what is considered an empty variable is not necessarily a null one.
Which is just is_null().
RE: a couple of potentially useful helpers - Hobbes - 11-01-2014
no i do not typically pass a function call to the empty function. just variables.
Plus, for me mainly being a C# and VB.Net developer using is_null_or_empty() is more natural. Even though at this point it is a useless function. lol