SunshinePHP Developer Conference 2015

mysql_field_seek

(PHP 4, PHP 5)

mysql_field_seekDefine o ponteiro do resultado para o índice de campo especificado

Descrição

bool mysql_field_seek ( resource $result , int $field_offset )

Move para o índice do campo especificado. Se a próxima chamada a mysql_fetch_field() não incluir um índice, o índice de campo especificado em mysql_field_seek() será retornado.

Parâmetros

result

The result resource that is being evaluated. This result comes from a call to mysql_query().

field_offset

The numerical field offset. The field_offset starts at 0. If field_offset does not exist, an error of level E_WARNING is also issued.

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em caso de falha.

Veja Também

  • mysql_fetch_field() - Obtém informações sobre uma coluna de um resultado e retorna como um objeto

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User Contributed Notes 4 notes

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0
adrien dot gibrat at gmail dot com
6 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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chris at igwsolutions dot com
6 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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poulpillusion at free dot fr
7 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)
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-3
Hassan Kazem
6 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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