PHP lengtes / mysqli_fetch_lengths() Funksie
Voorbeeld - Objekgeoriënteerde styl
Gee die lengte van die velde van die huidige ry in die resultaat-stel terug:
<?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();
}
$sql = "SELECT * FROM Persons ORDER BY Lastname";
if ($result = $mysqli -> query($sql)) {
$row =
$result -> fetch_row();
// Display field lengths
foreach ($result
-> lengths as $i => $val) {
printf("Field %2d has length: %2d\n", $i + 1, $val);
}
$result
-> free_result();
}
$mysqli -> close();
?>
Kyk na voorbeeld van prosedurele styl onderaan.
Definisie en gebruik
Die lengtes / mysqli_fetch_lengths() funksie gee die lengte van die velde van die huidige ry in die resultaat-stel terug.
Sintaksis
Objekgeoriënteerde styl:
$mysqli_result -> lengths
Prosedure styl:
mysqli_fetch_lengths(result)
Parameterwaardes
Parameter | Description |
---|---|
result | Required. Specifies a result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result() |
Tegniese besonderhede
Terugkeerwaarde: | Wys 'n skikking heelgetalle wat die grootte van elke veld (kolom) verteenwoordig. ONWAAR as 'n fout voorkom |
---|---|
PHP weergawe: | 5+ |
Voorbeeld - Prosedurele styl
Gee die lengte van die velde van die huidige ry in die resultaat-stel terug:
<?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();
}
$sql = "SELECT * FROM Persons ORDER BY Lastname";
if ($result = mysqli_query($con, $sql)) {
$row = mysqli_fetch_row($result);
// Display field lengths
foreach (mysqli_fetch_lengths($result) as $i => $val) {
printf("Field %2d has length: %2d\n", $i+1, $val);
}
mysqli_free_result($result);
}
mysqli_close($con);
?>
❮ PHP MySQLi-verwysing