mysqli_result::fetch_field
mysqli_result::fetch_object
MySQLi_Result
PHP Manual

# mysqli_result::fetch_fields

# mysqli_fetch_fields

(PHP 5)

mysqli_result::fetch_fields -- mysqli_fetch_fields — Returns an array of objects representing the fields in a result set

### 설명

Object oriented style (method):

array mysqli_result::fetch_fields ( void )

Procedural Style:

array mysqli_fetch_fields ( mysqli_result `$result` )

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.

### 인수

`result`

  순차 형식 전용: mysqli_query()나 mysqli_store_result()나 mysqli_use_result()가 반환한 결과셋 식별자.

### 반환값

Returns an array of objects which contains field definition information or `FALSE` if no field information is available.

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)

### 예제

Example #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();
?>`

Example #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);
?>`

위 예제의 출력:

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

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

### 참고

- mysqli_num_fields() - Get the number of fields in a result
- mysqli_fetch_field_direct() - Fetch meta-data for a single field
- mysqli_fetch_field() - Returns the next field in the result set

mysqli_result::fetch_field
mysqli_result::fetch_object
MySQLi_Result
PHP Manual