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mysqli_fetch_field

(PHP 5)

mysqli_fetch_field

(no version information, might be only in CVS)

result->fetch_field -- Returns the next field in the result set

Description

Procedural style:

object mysqli_fetch_field ( mysqli_result result )

Object oriented style (method):

class mysqli_result {

object fetch_field ( void )

}

The mysqli_fetch_field() returns the definition of one column of a result set as an object. Call this function repeatedly to retrieve information about all columns in the result set. mysqli_fetch_field() returns FALSE when no more fields are left.

Возвращаемые значения

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

Таблица 1. Object properties

Property	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 integer fields)

Примеры

Пример 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 all columns */

    while ($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();

?>

Пример 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 all fields */

    while ($finfo = mysqli_fetch_field($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);

?>

Результат выполнения данного примера:

Name:     Name
Table:    Country
max. Len: 11
Flags:    1
Type:     254

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

mysqli_fetch_fields

mysqli_fetch_field_direct

Last updated: Sat, 27 Jan 2007

add a note User Contributed Notes
mysqli_fetch_field

Jonathan
06-Mar-2007 03:43


Some corrections ;o)



$mysqli_type = array();

$mysqli_type[0] = "DECIMAL";

$mysqli_type[1] = "TINYINT";

$mysqli_type[2] = "SMALLINT";

$mysqli_type[3] = "INTEGER";

$mysqli_type[4] = "FLOAT";

$mysqli_type[5] = "DOUBLE";



$mysqli_type[7] = "TIMESTAMP";

$mysqli_type[8] = "BIGINT";

$mysqli_type[9] = "MEDIUMINT";

$mysqli_type[10] = "DATE";

$mysqli_type[11] = "TIME";

$mysqli_type[12] = "DATETIME";

$mysqli_type[13] = "YEAR";

$mysqli_type[14] = "DATE";



$mysqli_type[16] = "BIT";



$mysqli_type[246] = "DECIMAL";

$mysqli_type[247] = "ENUM";

$mysqli_type[248] = "SET";

$mysqli_type[249] = "TINYBLOB";

$mysqli_type[250] = "MEDIUMBLOB";

$mysqli_type[251] = "LONGBLOB";

$mysqli_type[252] = "BLOB";

$mysqli_type[253] = "VARCHAR";

$mysqli_type[254] = "CHAR";

$mysqli_type[255] = "GEOMETRY";

dedlfix
18-Jul-2006 10:26


There are MYSQLI_TYPE_* constants for the type property (listed in http://php.net/manual/en/ref.mysqli.php).



e.g.

<?php

if ($finfo->type == MYSQLI_TYPE_VAR_STRING)

  // a VARCHAR

jakerosoft at hotmail dot com
16-Aug-2005 09:15


<?

$fieldinfo = $result->fetch_field();

if ($fieldinfo & MYSQLI_NOT_NULL_FLAG)  {

  print "not null flag is set";

} else {

  print "not null flag is NOT set";

}

?>

Marc-Andr

Новости

11 июля 2007
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mysqli_fetch_field

Description

Возвращаемые значения

Смотрите также

Примеры