php - Dynamically created directory returns "Array" 1 in 1000 times -

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i'm fixing old code supposed create directory customer based on customer's last name. 999 out of 1000 times works expected every , "unable create base directory" error message , debug shows me $file_directory in case "array" instead of "\\network\path\order_data\1234567890_smith".

could explain how code work vast majority of time still consistently fail .1% of instances? or other code? thanks!

note: did not write code tring leave close original possible

edit had typo in previous code think tliokos , fluinc had point wanted fix mistake

code:

<?php  $file_directory = build_directory($customer, $uid);       if(!is_dir($file_directory)){   //check make sure not exist         if(!mkdir($file_directory)){                 mail("debug@example.com","unable create base directory","$file_directory");         }     }  function build_directory($customer, $uid){      if($customer->related_orders){         $related = explode(",", $customer->related_orders);          foreach($related $r_uid){             $rel_order = get_order($r_uid); //fetches order object              if((isset($rel_order->file_directory) && $rel_order->file_directory != "")){                 return $rel_order->file_directory;             }         }     }  //here made correction         $paths = array('\\\\network\\path');         $base = $paths[0];           //test if directory assigned         if(is_dir($base . "\\order_data\\".$uid."_".str_replace(" ","_",$customer->last_name)."\\")){              return $base . "\\order_data\\".$uid."_".str_replace(" ","_",$customer->last_name)."\\";         }          if($base){             return $base . "\\order_data\\".$uid."_".str_replace(" ","_",$customer->last_name)."\\";         }      }      ?>

change $base = array('\\network\path');
$base = '\\network\path';


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