Hi Currently i am developing a sub plugin for my own main plugin. Please see the main plugin code below
<?php
class MyClass
{
function __construct()
{
function test1()
{
echo 'hii- test1';
}
$this->autoload_function();
}
function autoload_function()
{
$my_array = array(
"test1"
);
foreach ($my_array as $my_function)
{
call_user_func($my_function);
}
}
}
$var = new MyClass();
?>
My sub plugin need to add more values to $my_array and i am allowed to use do_action or apply_filtere in main plugin.
I added apply_filters
, so that i can modify the $my_array in my sub plugin.
my-class.php
<?php
class MyClass
{
function __construct()
{
function test1()
{
echo 'hii- test1';
}
$this->autoload_function();
}
function autoload_function()
{
$my_array = array(
"test1"
);
apply_filters('modify_array', $my_array);
foreach ($my_array as $my_function)
{
call_user_func($my_function);
}
}
}
$var = new MyClass();
?>
In my sub plugin i checked the filter and i can see that filter is working perfectly so that i can modify the value of $my_array in my sub plugin.
my-newpage.php
add_filter ('modify_array', 'modify_array_function', 0);
function modify_array_function($my_array){
array_push($my_array, 'test2')
}
Here i can see that new value is added to array but now i have to define test2 function inside my sub plugin .
function test2(){
echo 'hii- test2';
}
When i write test2 function in my sub plugin i am getting below error .
Warning: call_user_func() expects parameter 1 to be a valid callback,
class ‘MyClass’ does not have a method
‘test2’
Now how can i solve this ? Do i need to add more action or filters in the sub plugin .
The issue is due to
call_user_func('test2');
is called inside my-class.php but the test2 function is defined outside mycalss. It is defined inside my sub plugin.
Please help to solve this error.
1 Answer
So I presumed your sub plugin loads after the main one, right?
Here i can see that new value is added to array but now i have to define test2 function inside my sub plugin
If you’re certain test2
successfully added to the array and that test2
was being called from MyClass::autoload_function()
, then you can try using an early hook like init
to define test2
, like so:
<?php
/* Plugin Name: My Sub Plugin */
// Defines the test2() function.
function my_define_test2() {
function test2(){
echo 'hii- test2';
}
}
// Now hook on init to ensure test2() is defined before your main plugin
// is loaded.
add_action( 'init', 'my_define_test2', 1 );
// And then add test2() to $my_array (that you defined in the main plugin).
add_filter( 'modify_array', 'modify_array_function' );
function modify_array_function( $my_array ) {
array_push( $my_array, 'test2' );
return $my_array; // remember, filters must always return something =)
}
If however MyClass
is instantiated immediately when WordPress loads the plugin, i.e. something like so, then I don’t think it’s possible for you to define test2
before MyClass
is instantiated. Unless maybe, if you use a Must Use plugin.
<?php
/* Plugin Name: My Main Plugin */
class MyClass { ... }
$var = new MyClass();