mysqli_field

Podręcznik PHP
Poprzedni		Następny

Description

Procedural style:

int mysqli_field_seek ( mysqli_result result, int fieldnr )

Object oriented style (method):

class mysqli_result {

int field_seek ( int fieldnr )

}

Sets the field cursor to the given offset. The next call to mysqli_fetch_field() will retrieve the field definition of the column associated with that offset.

Notatka: To seek to the beginning of a row, pass an offset value of zero.

Przykłady

Przykład 1. Object oriented style


<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";

if ($result = $mysqli->query($query)) {

    /* Get field information for 2nd column */
    $result->field_seek(1);
    $finfo = $result->fetch_field();
 
    printf("Name:     %s\n", $finfo->name);
    printf("Table:    %s\n", $finfo->table);
    printf("max. Len: %d\n", $finfo->max_length);
    printf("Flags:    %d\n", $finfo->flags);
    printf("Type:     %d\n\n", $finfo->type);
    
    $result->close();
}

/* close connection */
$mysqli->close();
?>

Przykład 2. Procedural style


<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";

if ($result = mysqli_query($link, $query)) {

    /* Get field information for 2nd column */
    mysqli_field_seek($result, 1);
    $finfo = mysqli_fetch_field($result);
 
    printf("Name:     %s\n", $finfo->name);
    printf("Table:    %s\n", $finfo->table);
    printf("max. Len: %d\n", $finfo->max_length);
    printf("Flags:    %d\n", $finfo->flags);
    printf("Type:     %d\n\n", $finfo->type);

    mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>

Powyższy przykład wyświetli:

Name:     SurfaceArea
Table:    Country
max. Len: 10
Flags:    32769
Type:     4

Poprzedni	Spis treści	Następny
mysqli_field_count	Początek rozdziału	mysqli_field_tell

mysqli_field_seek

Description

Zwracane wartości

Patrz także

Przykłady