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    mysql_fetch_assoc

    (PHP 4 >= 4.0.3, PHP 5)

    mysql_fetch_assoc — 連想配列として結果の行を取得する

    警告

    この拡張モジュールは PHP 5.5.0 で非推奨になり、PHP 7.0.0 で削除されました。 MySQLi あるいは PDO_MySQL を使うべきです。詳細な情報は MySQL: API の選択 を参照ください。 この関数の代替として、これらが使えます。

    説明

    mysql_fetch_assoc(resource $result): array

    取得した行に対応する連想配列を返し、内部のデータポインタを前に進めます。 mysql_fetch_assoc() は、 mysql_fetch_array() の 2 番目のパラメータを MYSQL_ASSOC に指定してコールするのと同じ働きをします。つまり、 連想配列のみを返します。

    パラメータ

    result

    評価された結果 リソース。この結果は、mysql_query() のコールにより得られたものです。

    戻り値

    取得した行に対応する文字列の連想配列を返します。行がもうない場合には false を返します。

    結果の複数のカラムが同じフィールド名を有している場合、最後のカラ ムが優先されます。同じ名前を有する他のカラムにアクセスするには、 mysql_fetch_row()を使用して数値添字を返すか、 エイリアス名を追加する必要があります。エイリアスの説明については、 mysql_fetch_array()の例を参照ください。

    例

    例1 mysql_fetch_assoc() のいろいろな例

    <?php

    $conn     = mysql_connect("localhost", "mysql_user", "mysql_password");

    if (!    $conn) {
    echo     "Unable to connect to DB: " . mysql_error();
    exit;
    }

    if (!    mysql_select_db("mydbname")) {
    echo     "Unable to select mydbname: " . mysql_error();
    exit;
    }

    $sql = "SELECT id as userid, fullname, userstatus
    FROM sometable
    WHERE userstatus = 1"    ;

    $result = mysql_query($sql);

    if (!    $result) {
    echo     "Could not successfully run query ($sql) from DB: " . mysql_error();
    exit;
    }

    if (    mysql_num_rows($result) == 0) {
    echo     "No rows found, nothing to print so am exiting";
    exit;
    }

    // データ行が存在する間、それを $row に連想配列形式でセットする
    // 注: 結果が 1 行であることがわかっているのなら、ループを利用しなくてもよい
    // 注: ループ内で extract($row); を実行すれば、
    // $userid, $fullname, そして $userstatus を利用できる
    while ($row = mysql_fetch_assoc($result)) {
    echo     $row["userid"];
    echo     $row["fullname"];
    echo     $row["userstatus"];
    }

    mysql_free_result($result);

    ?>

    注意

    注意: パフォーマンス

    特筆すべき点として、mysql_fetch_assoc() が 著しい付加価値があるにもかかわらず、 mysql_fetch_row()より それほど遅くはないということが言えます。

    注意: この関数により返されるフィー ルド名は 大文字小文字を区別 します。

    注意: この関数は、 NULL フィールドに PHPの null 値を設定します。

    参考

    add a note add a note

    User Contributed Notes 15 notes

    up
    6
    marREtijn dot posthMOuma at hoVEme dot nl
    21 years ago
    It appears that you can't have table.field names in the resulting array.
    Just use an alias if your results come up empty and you are using multi-table query's:

    $res=mysql_query("SELECT user.ID AS uID, order.ID AS oID FROM user, order WHERE ( order.userid=uID )";
    while ($row=mysql_fetch_assoc($res)) {
       echo "<p>userid: $row['uID'], orderid: $row['oID']</p>";
    }
    up
    4
    joe at kybert dot com
    20 years ago
    Worth pointing out that the internal row pointer is incremented once the data is collected for the current row.

    This means that multiple calls will iterate through the row data, so you DONT need to mysql_data_seek(..) between calls.

    This is noted in the  mysql_fetch_row() docs, but not here!?
    up
    0
    Typer85 at gmail dot com
    17 years ago
    Please be advised that the resource result that you pass to this function can be thought of as being passed by reference because a resource is simply a pointer to a memory location.

    Because of this, you can not loop through a resource result twice in the same script before resetting the pointer back to the start position.

    For example:

    ----------------
    <?php

    // Assume We Already Queried Our Database.

    // Loop Through Result Set.

    while( $queryContent = mysql_fetch_row( $queryResult ) {

            // Display.

            echo $queryContent[ 0 ];
    }

    // We looped through the resource result already so the
    // the pointer is no longer pointing at any rows.

    // If we decide to loop through the same resource result
    // again, the function will always return false because it
    // will assume there are no more rows.

    // So the following code, if executed after the previous code
    // segment will not work.

    while( $queryContent = mysql_fetch_row( $queryResult ) {

            // Display.

            echo $queryContent[ 0 ];
    }

    // Because $queryContent is now equal to FALSE, the loop
    // will not be entered.

    ?>
    ----------------

    The only solution to this is to reset the pointer to make it point at the first row again before the second code segment, so now the complete code will look as follows:

    ----------------
    <?php

    // Assume We Already Queried Our Database.

    // Loop Through Result Set.

    while( $queryContent = mysql_fetch_row( $queryResult ) {

            // Display.

            echo $queryContent[ 0 ];
    }

    // Reset Our Pointer.

    mysql_data_seek( $queryResult );

    // Loop Again.

    while( $queryContent = mysql_fetch_row( $queryResult ) {

            // Display.

            echo $queryContent[ 0 ];
    }

    ?>
    ----------------

    Of course you would have to do extra checks to make sure that the number of rows in the result is not 0 or else mysql_data_seek itself will return false and an error will be raised.

    Also please note that this applies to all functions that fetch result sets, including mysql_fetch_row, mysql_fetch_assos, and mysql_fetch_array.
    up
    -4
    george at georgefisher dot com
    15 years ago
    Thanks to to R. Bradley for the implode idea. The following fixes a few bugs and includes quote_smart functionality (and has been tested)

    <?php
           function mysql_insert_assoc ($my_table, $my_array) {
      
           //
       // Insert values into a MySQL database
       // Includes quote_smart code to foil SQL Injection
       //
       // A call to this function of:
       //
       //  $val1 = "foobar";
       //  $val2 = 495;
       //  mysql_insert_assoc("tablename", array(col1=>$val1, col2=>$val2, col3=>"val3", col4=>720, col5=>834.987));
       //
       // Sends the following query:
       //  INSERT INTO 'tablename' (col1, col2, col3, col4, col5) values ('foobar', 495, 'val3', 720, 834.987)
       //

               global $db_link;
          
               // Find all the keys (column names) from the array $my_array
               $columns = array_keys($my_array);

               // Find all the values from the array $my_array
               $values = array_values($my_array);
          
               // quote_smart the values
               $values_number = count($values);
           for (    $i = 0; $i < $values_number; $i++)
             {
                 $value = $values[$i];
             if (    get_magic_quotes_gpc()) { $value = stripslashes($value); }
             if (!    is_numeric($value))    { $value = "'" . mysql_real_escape_string($value, $db_link) . "'"; }
                 $values[$i] = $value;
             }
            
               // Compose the query
               $sql = "INSERT INTO $my_table ";

               // create comma-separated string of column names, enclosed in parentheses
               $sql .= "(" . implode(", ", $columns) . ")";
               $sql .= " values ";

               // create comma-separated string of values, enclosed in parentheses
               $sql .= "(" . implode(", ", $values) . ")";
          
               $result = @mysql_query ($sql) OR die ("<br />\n<span style=\"color:red\">Query: $sql UNsuccessful :</span> " . mysql_error() . "\n<br />");

           return (    $result) ? true : false;
       }
    ?>
    up
    -4
    jono
    18 years ago
    Note that the field names quoted within $row[] are case sensitive whereas many sql commands are case insensitive.
    up
    -6
    Daniel Chcouri - 333222 +A-T+ gmail
    15 years ago
    Fetching all the results to array with one liner:

    <?php
    $result     = mysql_query(...);
    while((    $resultArray[] = mysql_fetch_assoc($result)) || array_pop($resultArray));
    ?>
    up
    -5
    benlanc at ster dot me dot uk
    19 years ago
    It probably without saying, but using list() in conjunction with mysql_fetch_assoc() does not work - use mysql_fetch_row() instead.

    <?php
    $sql     = "SELECT `id`,`field`,`value` FROM `table`";
    $result = mysql_query($sql);

    // this results in empty values for rowID,fieldName,myValue
    list($rowID,$fieldName,$myValue) = mysql_fetch_assoc($result);

    // this is what you want:
    list($rowID,$fieldName,$myValue) = mysql_fetch_row($result);
    ?>
    up
    -4
    R. Bradley
    18 years ago
    In response to Sergiu's function - implode() would make things a lot easier ... as below:

    <?php
           function mysql_insert_assoc ($my_table, $my_array) {

               // Find all the keys (column names) from the array $my_array
               $columns = array_keys($my_array);

               // Find all the values from the array
               $values = array_values($my_array);

               // We compose the query
               $sql = "insert into `$my_table` ";
               // implode the column names, inserting "\", \"" between each (but not after the last one)
           // we add the enclosing quotes at the same time
               $sql .= "(\"" . implode("\", \"", $column_names) . "\")";
               $sql .= " values ";
               // Same with the values
               $sql .= "(" . implode(", ", $values) . ")";

               $result = mysql_query($sql);

           if (    $result)
           {
               echo     "The row was added sucessfully";
               return     true;
           }
           else
           {
               echo (    "The row was not added<br>The error was" . mysql_error());
               return     false;
           }
       }
    ?>

    Thus, a call to this function of:
    mysql_insert_assoc("tablename", array("col1"=>"val1", "col2"=>"val2"));

    Sends the following sql query to mysql:
    INSERT INTO `tablename` ("col1", "col2") VALUES ("val1", "val2")
    up
    -5
    jo at durchholz dot org
    19 years ago
    To sum up moverton at northshropshiredc dot gov dot uk and Olivier Fabre:

    If the query is "SELECT something1, something2, .... FROM tbl WHERE some_condition", the keys in the returned array will be 'something1', 'something2', etc. *even for those "somethings" that are not just field names*.

    Examples of non-fieldname "somethings" are:
    NULL
    NOW
    MAX(some_fieldname)

    I haven't tested whether this applies to table.fieldname, but I see no reason why it shouldn't (I'd suspect a typo in my code if I didn't get the expected results; I certainly have had my share of them!)

    I found it most convenient to check for typos by simply var_dumping the resulting row, like this:

    <?php
    echo '<pre>Got this row:'
    var_dump ($row);
    echo     '</pre>';
    ?>

    where $row is the result from the last call to mysql_fetch_assoc.
    up
    -6
    erik[at]phpcastle.com
    19 years ago
    When you have to loop multiple times through the result of a query you can set the result pointer to 0 (zero) with mysql_data_seek ()

    The advantage is that you do not have to query database twice with te same query :)

    So:
    <?php
      $query     = "
        SELECT *
        FROM database
      "    ;

          //Query database
          $result = mysql_query ($query);

          //Iterate result
          while ($record = mysql_fetch_assoc ($result)){
            print_r ($record);
      }

      ...

          //Point to 0 (zero)
          mysql_data_seek ($result, 0);

          //Re-use the result
          while ($record = mysql_fetch_assoc ($result)){
            print_r ($record);
      }
    ?>
    up
    -7
    chasfileDELETE_ALL_CAPS at gmail dot com
    18 years ago
    What if you *want* a two dimensional array?  Useful for output as an HTML table, for instance.

    function mysql_resultTo2DAssocArray ( $result) {
        $i=0;
        $ret = array();
        while ($row = mysql_fetch_assoc($result)) {
            foreach ($row as $key => $value) {
                $ret[$i][$key] = $value;
                }
            $i++;
            }
        return ($ret);
        }

    print_r(mysql_resultTo2DAssocArray(mysql_query("SELECT * FROM something")));

    Array ( [0] => Array ( [symbol] => ARNA
              [datetime] => 2006-02-17 16:00:00
              [price] => 16.83 )
         [1] => Array ( [symbol] => CALP
              [datetime] => 2006-02-17 16:00:00
              [price] => 6.54 )
         [2] => Array ( [symbol] => CROX
              [datetime] => 2006-02-17 16:00:00
              [price] => 27.4 ))
    up
    -7
    josh at joshstrike dot com
    15 years ago
    Here's a nifty function to copy a whole table to another table. Takes as its arguments
    $z -> the result of a SQL query with columns matching the table you're copying into.
    $toTable -> string name of the table to copy into.
    $link_identifier -> the db resource of the table you're copying into.
    If anyone can find a faster way to do this, I'd be glad to know about it...

    <?php
    function mysql_multirow_copy($z,$toTable,$link_identifier) {
            $fields = "";
        for (    $i=0;$i<mysql_num_fields($z);$i++) {
            if (    $i>0) {
                    $fields .= ",";
            }
                $fields .= mysql_field_name($z,$i);
        }
            $q = "INSERT INTO $toTable ($fields) VALUES";
            $c = 0;
            mysql_data_seek($z,0); //critical reset in case $z has been parsed beforehand. !
            while ($a = mysql_fetch_assoc($z)) {
            foreach (    $a as $as) {
                    $a[key($a)] = addslashes($as);
                    next ($a);
            }
            if (    $c>0) {
                    $q .= ",";
            }
                $q .= "('".implode(array_values($a),"','")."')";
                $c++;
        }
            $q .= ";";
            $z = mysql_query($q,$link_identifier);
        return (    $q);
    }
    ?>
    up
    -10
    nick at homefeedback dot com
    17 years ago
    function array2table: small fix to the post below that handles data returned from mysql that is either null or 0...

    This is a useful script for displaying MySQL results in an HTML table.

    <?

    function array2table($arr,$width)
       {
           $count = count($arr);
       if(    $count > 0){
               reset($arr);
               $num = count(current($arr));
           echo     "<table align=\"center\" border=\"1\"cellpadding=\"5\" cellspacing=\"0\" width=\"$width\">\n";
           echo     "<tr>\n";
           foreach(    current($arr) as $key => $value){
               echo     "<th>";
               echo     $key."&nbsp;";
               echo     "</th>\n";  
               }  
           echo     "</tr>\n";
           while (    $curr_row = current($arr)) {
               echo     "<tr>\n";
                   $col = 1;
               while (    false !== ($curr_field = current($curr_row))) {
                   echo     "<td>";
                   echo     $curr_field."&nbsp;";
                   echo     "</td>\n";
                       next($curr_row);
                       $col++;
                   }
               while(    $col <= $num){
                   echo     "<td>&nbsp;</td>\n";
                       $col++;      
               }
               echo     "</tr>\n";
                   next($arr);
               }
           echo     "</table>\n";
           }
       }

    ?>

    <?

    // Add DB connection script here

    $query = "SELECT * FROM mytable";
    $result = mysql_query($query);
    while(    $row = mysql_fetch_assoc($result)){
          $array[] = $row; }
         
    array2table($array,600); // Will output a table of 600px width

    ?>
    up
    -8
    moverton at northshropshiredc dot gov dot uk
    20 years ago
    Actually, Olivier, you're completely wrong about that, because there's a bug in your sample code. It will indeed return $row['MAX(time)'] - you have to pass the MySQL resource to mysql_fetch_assoc() and you're not doing that. This:

    $row = mysql_fetch_assoc($conn)

    ...where $conn is your DB connection, would in fact produce a result. The complete example below is taken from my own self-written content management system:

    $query = 'SELECT MAX(ctRevDate) FROM content group by ctPage';
    $querySet = mysql_query($query, $conn);
    $row = mysql_fetch_assoc($querySet);
    print_r($row);

    This produces:

    Array
    (
        [MAX(ctRevDate)] => 2004-01-15
    )

    ..on my testbed. So it doesn't in fact need an alias at all.
    up
    -13
    bkfake-php at yahoo dot com
    10 years ago
    Although deprecated as of PHP 5.5, the mySQL function do NOT trigger an E_DEPRECATED error
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