Anonymous functions with PHP / Eclipse

Eclipse is a great IDE, I don't know how could I live without it, but when it comes to PHP development, the PDT plugin shows some flaws unfortunately. It may happen that you need to declare an anonymous function and get a "compiler" error, as shown below:

just ignore it, the code is working perfectly well, so declaring an anonymous function will not give any problem, you just need to cope with the little red error message until the end of the project (or declare the callback as an identified function).

Below the code to declare the inner function for array_filter:

foreach( $sem_clusters as $sem_cluster ) {
	$terms = explode(';', preg_replace('/\"/', '', $sem_cluster->terms_meta));
	$terms = array_filter( $terms, function($value) { return strlen($value) > 2; });
	$tf_idf = array_merge( $tf_idf, $terms );
}