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+--- Thread: Helper - Call to undefined function (/showthread.php?tid=77770)
Helper - Call to undefined function - sjender - 10-16-2020
Hi All,
I'm new to CI (just started this week).
I am trying to get my own custom helper to work, but I keep getting 'Call to undefined function' errors.
Here's my code:
app/Helpers/build_page.php
PHP Code:
<?php
function tester(){
return "test";
}
app/Controllers/News.php (snippet)
PHP Code:
public function index()
{
helper('build_page');
echo tester();
As read in the manual I guess this should work?
But I keep getting:
Call to undefined function App\Controllers\tester()
What am I missing here.
RE: Helper - Call to undefined function - includebeer - 10-16-2020
It's not very clear in the documentation, but when you create a new helper, the filename must have the '_helper' suffix: https://codeigniter4.github.io/userguide/general/helpers.html?highlight=_helper#loading-a-helper
So rename your file to build_page_helper.php and it should work. To load the file, you don't need the suffix, so keep this line as is:
PHP Code:
helper('build_page');
RE: Helper - Call to undefined function - InsiteFX - 10-16-2020
As @ includebeer said, all helper files need to be like this name_helper.php
you always have to save the file with the _helper.php extension.
RE: Helper - Call to undefined function - Corsari - 02-28-2021
Hello dear CI4 experts
I'm in a similar situation
I have
/App/Helpers/isactive_helper.php
the content of isactive_helper.php is
PHP Code:
<?php
if ( ! function_exists('setActive')){
function setActive($uriCheck)
{
$uri = new \CodeIgniter\HTTP\URI();
$uriSegment = $uri->getPath();
if ( $uriSegment == $uriCheck ) {
echo "active";
}
}
}
I then use this helper inside a view (which is the main layout view of my app)
Code:
24 <ul class="navbar-nav mr-auto">
25 <li class="nav-item <?php setActive("tasks"); ?>">
26 <a class="nav-link" href="<?= site_url("tasks") ?>">Tasks</a>
27 </li>but as I open the app URL, I get
Call to undefined function setActive()
and it is highlighted exactly line 25 of the view
Can you kindly hint with what's wrong?
Thank you
RE: Helper - Call to undefined function - includebeer - 02-28-2021
You need to load the file in your controller before you can use its functions in a view.
PHP Code:
helper(“isactive”);
RE: Helper - Call to undefined function - Corsari - 02-28-2021
(02-28-2021, 12:38 PM)includebeer Wrote: You need to load the file in your controller before you can use its functions in a view
the "Call to undefined function" problem is solved
but ...
for the above code,
Code:
$uriSegment = $uri->getPath();used inside the helper returns always "" , an empty string ( tested with dd() )
while used inside the view, it actually returns the path at right of the site_url
RE: Helper - Call to undefined function - daveontheciforum - 03-01-2021
The URI class needs an actual URI to work with. So instead of creating one directly, you can get the current URI from the current request:
PHP Code:
// $uri = new \CodeIgniter\HTTP\URI();
$request = \Config\Services::request();
$uri = $request->uri;
RE: Helper - Call to undefined function - Corsari - 03-01-2021
(03-01-2021, 02:28 AM)daveontheciforum Wrote: The URI class needs an actual URI to work with. So instead of creating one directly, you can get the current URI from the current request:
PHP Code:// $uri = new \CodeIgniter\HTTP\URI();
$request = \Config\Services::request();
$uri = $request->uri;
Thank you Dave
it works! , I conceived and created my first helper !
Though as seen in the layout HTML above, I went for
PHP Code:
$request = \Config\Services::request();
$uriSegment = $request->uri->getPath();
since in the navigation menu items, anybody and in any situation will use the same strings
Thank you