php - Mysqli Delete request blocks -

i got strange behavior cannot allows me delete single line on table, in fact, enters mysqli->query line ask delete, stops , nothing (the echo post after isn't displayed @ all), here code, , i'd know what's wrong :

i've posted in deleteline function thing outpouts correctly echo, , things don't :

<?php  //here db connexion  include 'conndb.php';  //array that'll stock values delete  $myarray = array();    //lists elements of table animals  if ($result = $mysqli->query("select * animals")) {    while($row = $result->fetch_array(mysql_assoc)) {    //searching specific lines           $delay= timepassed($row["time"]);           if($delay >= 60){           	 //save id of line  in array           	 $myarray[] = $row["id"];           }      }      }  $result->close();    //once lines delete saved in array, let's delete  for($i=0;$i<count($myarray);$i++){  //will call , delete 1 line 1  	deleteline($myarray[$i]);  }  $mysqli->close();    					  ////////////////////////////////////////////////////////////////////////////////////////////////timepassed  //just compare 2 timestamps between them  function timepassed($datetocompare){  	$datenow = time();  	$res =round(($datenow-$datetocompare)/(60*60));  	return $res;   }  ////////////////////////////////////////////////////////////////////////////////////////////////deleteline  function deleteline($id){  	echo $id;  //outputs correctly id of line targeted  (in case : 83)  $mysqli->query("delete animals id=".$id);  echo"line deleted"; //this never outputs    }  ?>

i don't see how database connection object $mysqli. inside function, put global $mysqli use connection object @ outside function.

function deleteline($id){              global $mysqli;//database connection object              $mysqli->query("delete `animals` `id` ='$id'");                 if($mysqli->affected_rows>0){                  echo "line deleted";              }else{                  echo 'delete failed';             }            $mysqli->close();      } 

hope may , use prepared statement better security.