PHP mysqli fetch_field() Function
Example - Object Oriented style
Return the next field (column) in the result-set, then print each field's name, table, and max length:
<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");
if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " .
$mysqli -> connect_error;
exit();
}
$sql = "SELECT Lastname, Age FROM Persons ORDER BY Lastname";
if ($result = $mysqli -> query($sql)) {
// Get field information for all fields
while ($fieldinfo =
$result -> fetch_field()) {
printf("Name: %s\n", $fieldinfo -> name);
printf("Table: %s\n", $fieldinfo -> table);
printf("Max. Len: %d\n", $fieldinfo -> max_length);
}
$result
-> free_result();
}
$mysqli -> close();
?>
Look at example of procedural style at the bottom.
Definition and Usage
The fetch_field() / mysqli_fetch_field() function returns the next field (column) in the result-set, as an object.
Syntax
Object oriented style:
$mysqli_result -> fetch_field()
Procedural style:
mysqli_fetch_field(result)
Parameter Values
| Parameter | Description |
|---|---|
| result | Required. Specifies a result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result() |
Technical Details
| Return Value: | Returns an object containing field definition information. FALSE if no info is available. The object has the following properties:
|
|---|---|
| PHP Version: | 5+ |
Example - Procedural style
Return the next field (column) in the result-set, then print each field's name, table, and max length:
<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}
$sql = "SELECT Lastname, Age FROM Persons ORDER BY Lastname";
if ($result = mysqli_query($con, $sql)) {
// Get field information for all fields
while ($fieldinfo = mysqli_fetch_field($result)) {
printf("Name: %s\n", $fieldinfo -> name);
printf("Table: %s\n", $fieldinfo -> table);
printf("max. Len: %d\n", $fieldinfo -> max_length);
}
mysqli_free_result($result);
}
mysqli_close($con);
?>
❮ PHP MySQLi Reference
