mysql_field_seek

(PHP 4, PHP 5)

mysql_field_seek — Déplace le pointeur de résultat vers une position donnée

Avertissement

Cette extension était obsolète en PHP 5.5.0, et a été supprimée en PHP 7.0.0. À la place, vous pouvez utiliser l'extension MySQLi ou l'extension PDO_MySQL. Voir aussi MySQL : choisir une API du guide. Alternatives à cette fonction :

mysqli_field_seek()
PDOStatement::fetch() utilisant le paramètre cursor_orientation et le paramètre offset

Description

mysql_field_seek(resource $result, int $field_offset): bool

mysql_field_seek() place le pointeur de résultat result sur le champ spécifié par sa position field_offset. Lors du prochain appel à mysql_fetch_field() qui n'aura pas d'argument d'index de champ, le champ désormais pointé sera retourné.

Liste de paramètres

result: La ressource de résultat qui vient d'être évaluée. Ce résultat vient de l'appel à la fonction mysql_query().
field_offset: La position numérique du champ. field_offset commence à 0. Si field_offset n'existe pas, une alerte de niveau E_WARNING sera générée.

Valeurs de retour

Cette fonction retourne true en cas de succès ou false si une erreur survient.

Voir aussi

mysql_fetch_field() - Retourne les données enregistrées dans une colonne MySQL sous forme d'objet

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User Contributed Notes 4 notes

down

adrien dot gibrat at gmail dot com ¶

16 years ago

Not dumb at all!!

It means that "mysql_field_seek" and "mysql_data_seek" are moving the same cursor... through the rows and columns of the result resource.

Also means that the cursor goes to a new row when it reach a final field(aka column), by exemple while looping with "mysql_fetch_field".

Calling "mysql_fetch_object", "mysql_fetch_array", "mysql_fetch_assoc"
and "mysql_fetch_row" seems to place the cursor at the end of the line.

So calling "mysql_fetch_field" without a field index, just after that, will return false.

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-1

chris at igwsolutions dot com ¶

16 years ago

I spent a good deal of time trying to get the example to work, but the example does not work. 
To do what the exaple is trying to do, you would need to use mysql_data_seek

assume we have table named testing which contains
id      name
1       Hassan
2       Jack
3       Rose
---------------

Here is an expample that will do the above example. 

Since I am more comfortable in a OOP setting, I used mysql_fetch_object

<?php
    require("myConnenctionFile.php");
    
    $sql="SELECT  * from testing";
    $result=mysql_query($sql);

    $row = mysql_fetch_object($result);
    echo $row->id . ' ' . $row->name; // Output is (1      Hassan)
    mysql_data_seek($result,2);
    $row = mysql_fetch_object($result);
    echo $row->id . ' ' . $row->name; // Output is (3      Rose)
    echo "<BR><BR>";
?>

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-1

poulpillusion at free dot fr ¶

17 years ago

A dumb comment... but it may save people some time : 
mysql_field_seek != mysql_data_seek

In order to fetch again the results of a resource result from the beginning, you will use mysql_data_seek(id, 0)

down

-4

Hassan Kazem ¶

16 years ago

an example of this function
assume we have table1 which contains
ID      Name
1       Hassan
2       Jack
3       Rose
---------------
<?php 
mysql_connect("sql.server.com", "username", "password") or die(mysql_error()); 
mysql_select_db("database") or die(mysql_error()); 
$sql="SELECT  * from table1";
$result=mysql_query($sql);
$row = mysql_fetch_array($result);
echo $row['ID'] . ' ' . $row['Name']; // Output is (1      Hassan)
mysql_field_seek($result,2);
echo $row['ID'] . ' ' . $row['Name']; // Output is (3      Rose)
?>
---------------
// You can see that the seek command forwarded the pointer one step and skipped row number 2

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