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:
mixed
mysqli_fetch_field ( object result)
Object oriented style (method):
class
result {
mixed
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.
Return values
Returns an object which contains field definition informations 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. |
| 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) |
Example
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);
?> | |
The above examples would produce the following output:
Name: Name
Table: Country
max. Len: 11
Flags: 1
Type: 254
Name: SurfaceArea
Table: Country
max. Len: 10
Flags: 32769
Type: 4 |