PHP mysqli field_seek() Funksie
Voorbeeld - Objekgeoriënteerde styl
Stel die veldwyser na die tweede kolom ("Ouderdom") in die resultaatstel, kry veldinligting met fetch_field(), druk dan die veld se naam, tabel en maksimum lengte:
<?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
second column
$result = field_seek(1);
$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();
?>
Kyk na voorbeeld van prosedurele styl onderaan.
Definisie en gebruik
Die field_seek() / mysqli_field_seek() funksie stel die veldwyser na die gegewe veld offset.
Sintaksis
Objekgeoriënteerde styl:
$mysqli_result -> field_seek(fieldnr)
Prosedure styl:
mysqli_field_seek(result, fieldnr)
Parameterwaardes
| 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 |
Tegniese besonderhede
| Terugkeerwaarde: | WAAR oor sukses. ONWAAR op mislukking |
|---|---|
| PHP weergawe: | 5+ |
Voorbeeld - Prosedurele styl
Stel die veldwyser na die tweede kolom ("Ouderdom") in die resultaatstel, kry veldinligting met mysqli_fetch_field(), druk dan die veld se naam, tabel en maksimum lengte:
<?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
second column
mysqli_field_seek($result, 1);
$fieldinfo = mysqli_fetch_field($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-verwysing