	О проекте
	Руководство php

mysqli_fetch_fields

(PHP 5)

mysqli_fetch_fields

(no version information, might be only in CVS)

result->fetch_fields -- Returns an array of objects representing the fields in a result set

Description

Procedural Style:

array mysqli_fetch_fields ( mysqli_result result )

Object oriented style (method):

class mysqli_result {

array fetch_fields ( void )

}

This function serves an identical purpose to the mysqli_fetch_field() function with the single difference that, instead of returning one object at a time for each field, the columns are returned as an array of objects.

Возвращаемые значения

Returns an array of objects 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 */

    $finfo = $result->fetch_fields();



    foreach ($finfo as $val) {

        printf("Name:     %s\n", $val->name);

        printf("Table:    %s\n", $val->table);

        printf("max. Len: %d\n", $val->max_length);

        printf("Flags:    %d\n", $val->flags);

        printf("Type:     %d\n\n", $val->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 columns */

    $finfo = mysqli_fetch_fields($result);

 

    foreach ($finfo as $val) {

        printf("Name:     %s\n", $val->name);

        printf("Table:    %s\n", $val->table);

        printf("max. Len: %d\n", $val->max_length);

        printf("Flags:    %d\n", $val->flags);

        printf("Type:     %d\n\n", $val->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

add a note User Contributed Notes
mysqli_fetch_fields

Rob
09-Mar-2007 08:24


"max_length: The maximum width of the field for the result set."

Not a native English speaker, I could be reading this wrong, but the max_length property doesn't reflect the maximum length of a field but returns the current length of the contents of a field (something that can easily be derived using the strlen() function):



mysql> describe domains;

+--------------+--------------+

| Field              | Type             |

+--------------+--------------+

...

| name             | varchar(255) |

...



$info = $query->fetch_fields();

foreach ($info as $value)

    print "[max_length] ".$value->max_length."\n";



This results in:



[max_length] 14



The number of characters in this field actually is 14, but the maximum length of the field is 255.

Jonathan
07-Mar-2007 02:12


The "type" property will return a numerical representation of a field type instead of a "meaningful" string.



Here is an array that may help you:



<?php

$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";

?>

add a note

mysqli_fetch_lengths

mysqli_fetch_field

Last updated: Sat, 27 Jan 2007

This mirror generously provided by: Yahoo! Inc.
Last updated: Sun Nov 4 14:16:40 2007 PST

Новости

11 июля 2007
Сайт запущен

mysqli_fetch_fields

Description

Возвращаемые значения

Смотрите также

Примеры