php - table does not exists mysql but it does for loop -


i hava weired problem here mysql database , php.

in php, gets table names , loops through tables. takes rows , send variables function. using loops this.

the problem have 7 tables. if table 2 , 3 contain rows loops through 2 , correctly. , not give table not exists error table 1. table 3-7 gives table not exists.

but if remove rows in table 2 loops through 3 , works correctly, , gives no error 1 , 2. table 4-7 gives table not exists err. loops through 1 table rows , gives errors following tables. don't understand connection problem mysql or else.

below snippet of code:

        <?php         $hostname_localhost ="localhost";         $username_localhost ="xxxxxxx";         $password_localhost ="xxxxxxxxx";         $database_xxxxxxxxxx ="xxxxxxxxx";         $database_yyyyyyyyyyy ="yyyyyyyyyy";         $database_zzzzz = "zzzzz";          $localhost = mysql_connect($hostname_localhost,$username_localhost,$password_localhost)         or         trigger_error(mysql_error(),e_user_error);          $get_all_tables = mysql_query("show tables xxxxxxxxx");          $table_names = array();          while($row = mysql_fetch_array($get_all_tables, mysql_num)) {         array_push($table_names,$row[0]);         }          mysql_select_db($database_xxxxxxx, $localhost);           ($i=0; $i<sizeof($table_names); $i++){               $table = trim($table_names[$i]);              $get_tag = mysql_query("select * $table");              if ($get_tag){              while($get_tag_infos = mysql_fetch_array($get_tag)){                                  $similarity = $get_tag_infos['similarity'];                                 //........... , many other variables                                  if ($similarity == 20){                                      get20(many variables);                                  }                                 if ($similarity == 40){                                      get40(many variables);                                  }                                 if ($similarity == 60){                                      get60(many varibales);                                  }                                 if ($similarity == 80){                                      get80(many variables);                                  }                                 if ($similarity == 100){                                      get100(many variables);                                  }                             }                }             else{                 echo '</br> error! </br>'.mysql_error().mysql_errno();             }         }          function get20(many variables){             // performs insert function mysql         }          function get40(many variables){             // performs insert function mysql         }          function get60(many variables){             // performs insert function mysql         }          function get80(many variables){             // performs insert function mysql          }          function get100(many variables){             // performs insert function mysql         }          ?>

the problem connection database. after first table find connection has been changed inner connection. use different variables connections. setting code running perfectly. have tested.

<?php  //conection:  $link = mysqli_connect("localhost","root","pass","test") or die("error " . mysqli_error($link));   //consultation:   $query = "show tables" or die("error in consult.." . mysqli_error($link));   //execute query.   $result = mysqli_query($link, $query);   //display information:   while($row = mysqli_fetch_array($result)) {    echo $row["tables_in_test"] . "<br>";     $link2 = mysqli_connect("localhost","root","pass","test") or die("error " . mysqli_error($link));   $query2 = "select * ".$row['tables_in_test'] or die("error in consult.." . mysqli_error($link2));    $result2 = mysqli_query($link2, $query2);     while($row2 = mysqli_fetch_array($result2)) {     echo "<pre>";     print_r($row2);     echo "</pre>";   }  }  ?>

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