Fungsi PHP mysqli fetch_field_direct()
Contoh - Gaya Berorientasi Objek
Kembalikan meta-data untuk satu bidang di kumpulan hasil, lalu cetak nama bidang, tabel, dan panjang maksimal:
<?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
column "Age"
$fieldinfo = $result -> fetch_field_direct(1);
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();
?>
Lihatlah contoh gaya prosedural di bagian bawah.
Definisi dan Penggunaan
Fungsi fetch_field_direct() / mysqli_fetch_field_direct() mengembalikan meta-data untuk satu bidang dalam kumpulan hasil, sebagai objek.
Sintaksis
Gaya berorientasi objek:
$mysqli_result -> fetch_field_direct(fieldnr)
Gaya prosedural:
mysqli_fetch_field_direct(result, fieldnr)
Nilai Parameter
| Parameter | Description |
|---|---|
| result | Required. Specifies a result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result() |
| fieldnr | Required. Specifies the field number. Must be an integer from 0 to number of fields-1 |
Detail Teknis
| Nilai Kembali: | Mengembalikan objek yang berisi informasi definisi bidang. SALAH jika tidak ada info yang tersedia. Objek memiliki properti berikut:
|
|---|---|
| Versi PHP: | 5+ |
Contoh - Gaya prosedural
Kembalikan meta-data untuk satu bidang di kumpulan hasil, lalu cetak nama bidang, tabel, dan panjang maksimal:
<?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
column "Age"
$fieldinfo = mysqli_fetch_field_direct($result, 1);
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);
?>
Referensi PHP MySQLi