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    mssql_fetch_field

    (PHP 4, PHP 5, PECL odbtp >= 1.1.1)

    mssql_fetch_field — Liefert Informationen über ein Feld

    Warnung

    Diese Funktion wurde in PHP 7.0.0 REMOVED (entfernt).

    Alternativ können folgende Features verwendet werden:

    Beschreibung

    mssql_fetch_field ( resource $result [, int $field_offset = -1 ] ) : object

    mssql_fetch_field() wird verwendet, um im Ergebnis einer Anfrage Informationen über Felder zu erhalten.

    Parameter-Liste

    result

    Der Bezeichner des Ergebnisses, das ausgewertet wird. Dieses Ergebnis stammt von einem Aufruf von mssql_query().

    field_offset

    Der numerische Feld-Offset. Wurde kein Feld-Offset angegeben, liefert diese Funktion das nächste Feld, das noch nicht abgefragt wurde. Der field_offset beginnt bei Null.

    Rückgabewerte

    Gibt ein Objekt mit Informationen über ein Feld zurück.

    Die Eigenschaften dieses Objekts sind:

    • name - Feldname. Wenn das Feld das Ergebnis einer Funktion ist, wird diese Eigenschaft auf computed#N gesetzt, wobei #N eine fortlaufende Nummer ist.
    • column_source - die Tabelle, zu der das Feld gehört
    • max_length - maximale Feldbreite
    • numeric - 1, wenn es sich um ein numerisches Feld handelt
    • type - der Feldtyp.

    Beispiele

    Beispiel #1 mssql_fetch_field()-Beispiel

    <?php
    // Mit MSSQL verbinden und Datenbank auswählen
    mssql_connect('MANGO\SQLEXPRESS', 'sa', 'phpfi');
    mssql_select_db('php');

    // Eine Select-Anfrage an MSSQL senden
    $anfrage = mssql_query('SELECT * FROM [php].[dbo].[persons]');

    // Eine Tabelle bauen
    echo '<h3>Tabellenstruktur für \'persons\'</h3>';
    echo     '<table border="1">';

    // Tabellenkopf
    echo '<thead>';
    echo     '<tr>';
    echo     '<td>Feldname</td>';
    echo     '<td>Datentyp</td>';
    echo     '<td>Max. Länge</td>';
    echo     '</tr>';
    echo     '</thead>';

    // Alle Felder anzeigen
    echo '<tbody>';

    for (    $i = 0; $i < mssql_num_fields($anfrage); ++$i) {
            // Feldinformationen abrufen
            $feld = mssql_fetch_field($anfrage, $i);

            // Eine Zeile ausgeben
            echo '<tr>';
        echo     '<td>' . $feld->name . '</td>';
        echo     '<td>' . strtoupper($feld->type) . '</td>';
        echo     '<td>' . $feld->max_length . '</td>';
        echo     '</tr>';
    }

    echo     '</tbody>';
    echo     '</table>';

    // Den Ergebnisspeicher freigeben
    mssql_free_result($anfrage);
    ?>

    Siehe auch

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    User Contributed Notes 10 notes

    up
    0
    schattenfeld at gmail dot com
    17 years ago
    If you want to describe table like DESCRIBE in MySQL you can use this:
    $sql = <<<SQL
    SELECT column_name,data_type,column_default,is_nullable
    FROM
      information_schema.tables AS t
      JOIN
      information_schema.columns AS c ON
        t.table_catalog=c.table_catalog AND
        t.table_schema=c.table_schema AND
        t.table_name=c.table_name
    WHERE
      t.table_name='TABLE-NAME'
    SQL;
    up
    0
    huszti_dot_roland_at_freemail_dot_com
    18 years ago
    For really detailed table information, use syscolumns, like this:

    SELECT c.name, c.prec, c.scale, t.name type
      FROM syscolumns c, systypes t, sysobjects o
      WHERE o.name = 'yourtablename' AND o.id = c.id AND c.xtype = t.xtype

    For other properties see the MS SQL online help. Search for 'syscolumns'.

    Or an another solution:

    sp_columns @table_name = 'yourtablename', @column_name = 'thecolumnname'
    //no "select ..." !!!!

    This gives info about only the specified column.
    up
    0
    php_rindern_de
    20 years ago
    commenting Reynard Hilman:

    for me it looks like the colstat field value of 1 in syscolumns table indicates an Identity Column.
    up
    0
    Reynard Hilman
    21 years ago
    If you want to describe table structure (like mysql 'desc table' command), sending this query might help:
    <?
    $sql     = "SELECT c.name, c.isnullable, c.length, c.colstat, t.name type
      FROM syscolumns c, systypes t, sysobjects o
      WHERE o.name = '    $table' AND o.id = c.id AND c.xtype = t.xtype";
    ?>
    I suspect the colstat field in syscolumns table indicates primary key when its value is 1
    up
    0
    bmaddy_at_class_dot_umn_dot_edu
    21 years ago
    Be aware that this function will only return the first 30 characters of the name of the column.  If the actual column name is longer, it will be truncated.  This is at least true with the following setup:
    PHP 4.3.1
    MSSQL 8.00.760

    Have a good day everyone!
    Brian
    up
    0
    alonf at spiralsolutions dot com
    22 years ago
    As kubalaa at bigfoot dot com note mssql_fetch_field->column_source return field name instead table name also with MSSQL2000 connection. Be adwised!!!
    up
    -1
    pong at taft dot org
    22 years ago
    When you mssql_fetch_field(int result), you need to do loop to get the name of each field.  Something like:

    while($fld = mssql_fetch_field($rs)){
            echo $fld->name . "<br>";        
        }

    I am wondering why we cannot refer it by a field number.
    up
    -1
    kubalaa at bigfoot dot com
    24 years ago
    Using this function with MSSQL 7, $returned->column_source is the column name, not the table name as it should be.
    up
    -2
    not a mail address
    16 years ago
    kubalaa at bigfoot dot com first reported the problem that column_source contains the FIELD name instead of the source TABLE name 04-Apr-2000 03:58. The bug has been reported as well.

    For those who wonder if it was fixed over the past 8 years: No, the bug still is the same, no workaround available.
    up
    -2
    skipsey at hotmail dot com
    23 years ago
    It seems fairly hard to get a list of the tables from your database using MSSQL but this seems to do the trick. This is set to get only the User Tables and ignores the sytem tables.

    <?php
    mssql_connect    ("server","","") or die ("help me!");
    mssql_select_db("") or die ("Noooo!");

    $result = mssql_query ("sp_tables");
    $fields = mssql_num_fields ($result);
    $rows   = mssql_num_rows ($result);

    for (    $f=0; $f<$rows; $f++) {   
            $CHKTYPE=GetField($result,"TABLE_TYPE",$f);
       
        if(    $CHKTYPE=='TABLE'){

                //$name = mssql_fetch_field($result, 2);
                $field=GetField($result,"TABLE_NAME",$f)."<br>";
            echo     $field;

        }
    }
    ?>
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