mysqli_result::fetch_field_direct

mysqli_fetch_field_direct

(PHP 5, PHP 7)

mysqli_result::fetch_field_direct -- mysqli_fetch_field_direct — Fetch meta-data for a single field

Açıklama

Nesne yönelimli kullanım

mysqli_result::fetch_field_direct ( int $fieldnr ) : object

Yordamsal kullanım

mysqli_fetch_field_direct ( mysqli_result $result , int $fieldnr ) : object

Returns an object which contains field definition information from the specified result set.

Değiştirgeler

sonuç

Sadece yordamsal tarz: mysqli_query(), mysqli_store_result() veya mysqli_use_result() işlevinden dönen bir sonuç kümesi tanıtıcısı.

fieldnr

The field number. This value must be in the range from 0 to number of fields - 1.

Dönen Değerler

Returns an object which contains field definition information or FALSE if no field information for specified fieldnr is available.

Object attributes
Attribute Description
name The name of the column
orgname Original column name if an alias was specified
table The name of the table this field belongs to (if not calculated)
orgtable Original table name if an alias was specified
def The default value for this field, represented as a string
max_length The maximum width of the field for the result set.
length The width of the field, as specified in the table definition.
charsetnr The character set number for the field.
flags An integer representing the bit-flags for the field.
type The data type used for this field
decimals The number of decimals used (for numeric fields)

Örnekler

Örnek 1 Nesne yönelimli kullanım

<?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 Name LIMIT 5";

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

    /* Get field information for column 'SurfaceArea' */
    $finfo = $result->fetch_field_direct(1);

    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", $finfo->type);

    $result->close();
}

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

Örnek 2 Yordamsal kullanım

<?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 Name LIMIT 5";

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

    /* Get field information for column 'SurfaceArea' */
    $finfo = mysqli_fetch_field_direct($result, 1);

    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", $finfo->type);

    mysqli_free_result($result);
}

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

Yukarıdaki örneklerin çıktısı:

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

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