Why does PHP foreach not enter

Why does PHP foreach not enter

PHP Code

  
           $RSQL =sprintf (Self::getqatt, $CID);        $US = $this->mysql->getdata ($RSQl);        echo $RSQL;        $uc =count ($US);        if ($uc >0)        {            foreach ($US as $u)            {                echo $u [' UID '];            }        }

$uc is clearly greater than 0, why does foreach not enter

------Solution--------------------
Print_r ($US); Look

------Solution--------------------
Before foreach, output the $US.

PHP code

 if ($uc >0) {print_r ($US);                foreach ($US as $u) {echo "#TEST #";            echo $u [' UID ']; }} 
------solution--------------------
 
    
     discusses  
    
 $uc more than 0, why does foreach not enter the br> 
    
------Solution--------------------
 That's a problem with the database connection, check it out. 
------Solution--------------------
 $US = $this->mysql->getdata ($RSQl); 
  Print_r ($US);
   Paste the results to see 
------solution--------------------
 
    
     discussion  
    
 
    
 No problem, if anything, how can $UC be greater than 0? 
    
 
    
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