implode() error

i want to use implode function for exploded veriables.
i am using this function but i want to use in my class.

public function array_implode($arrays, &$target = array()) {
        foreach ($arrays as $item) {
            if (is_array($item)) {
                $this->array_implode($item, $target);
            } else {
                $target[] = $item;
            }
        }
        return $target;
    }

PHP:

using:

$return = implode('|', $this->array_implode($sonuc2));

PHP:

this error

Warning:  Invalid argument supplied for foreach() in C:\AppServ\www\disavurv2\classes\arkadas.class.php on line 7

PHP:

Function's line 7

  foreach ($arrays as $item) {

PHP:

Help me

 

Run a print_r on the original array before passing it to the method. What does it show?

Also, I would replace

array_implode($arrays, &$target = array())

with

array_implode($arrays, $target = array())

Pass by reference is depreciated in php 5.3+

 

thanks for help..

i resolve the my problem.
my problem is $sonuc2 not array

for example: var_dump()