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+--- Thread: How to check if a library exist in a controller? (/showthread.php?tid=65102)
How to check if a library exist in a controller? - agriz - 04-29-2016
PHP Code:
if(file_exists("../libraries/myapp/" . ucfirst($library_name).".php")) {
This code is not working for me.
It is written inside of a controller.
I have a default library and some special libraries.
If special libraries are just the controller names.
If they exist, they should be loaded. Or the default one should be loaded.
PHP Code:
if(file_exists("../libraries/myapp/" . ucfirst($library_name).".php")) {
$this->load->library("myapp/".$library_name);
}
else {
$this->load->library("app_default_library");
}
What is the right way to check the existence of a library?
RE: How to check if a library exist in a controller? - Tpojka - 04-29-2016
Check if object is available:
PHP Code:
$is_loaded = is_object(@$this->upload) ? TRUE : FALSE;// @ sign suppressed error if object didn't exist
var_dump($is_loaded);
exit;
Now you just need to make your own method that take a parameter as name of library:
PHP Code:
private function is_lib($lib)
{
return is_object(@$this->{$lib}) ? TRUE : FALSE;
}
PHP is_object function.
RE: How to check if a library exist in a controller? - agriz - 04-29-2016
How can we use
PHP Code:
$this->{$lib}
Dont we need to load it first?
PHP Code:
$this->load->library($lib); //This lines throws 500 Internal Server Error. Because that library is not available.
RE: How to check if a library exist in a controller? - Tpojka - 04-29-2016
I understand that you want first to check if library loaded.
If not than you need to load, else you just use that library:
PHP Code:
public function some_other_method()
{
if ( ! $this->is_lib($lib))
{
$this->load->library($lib);
}
// rest of your code
}
private function is_lib($lib)
{
return is_object(@this->{$lib}) ?: FALSE;
}