fetch_lengths()
PHP lengths / mysqli_fetch_lengths() funksiyasi
Misol - obyektga yo‘naltirilgan uslub
Natijalar to‘plamidagi joriy qator maydonlarining uzunligini qaytaring:
<?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();
?>
Protsedural uslubdagi misolni sahifa pastida ko‘ring.
Ta’rif va qo‘llanilishi
lengths / mysqli_fetch_lengths() funksiyasi natijalar to‘plamidagi joriy qator maydonlarining uzunligini qaytaradi.
Sintaksis
Obyektga yo‘naltirilgan uslub:
$mysqli_result -> lengths
Protsedurali uslub:
mysqli_fetch_lengths(result)
Parametr qiymatlari
| Parametr | Tavsif |
|---|---|
| result | Majburiy. mysqli_query(), mysqli_store_result() yoki mysqli_use_result() qaytargan natijalar to‘plami identifikatorini belgilaydi |
Texnik tafsilotlar
| Qaytariladigan qiymat: | Har bir maydonning (ustunning) hajmini ifodalovchi butun sonlar massivini qaytaradi. Xato yuz bersa, FALSE |
|---|---|
| PHP versiyasi: | 5+ |
Misol - protsedural uslub
Natijalar to‘plamidagi joriy qator maydonlarining uzunligini qaytaring:
<?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);
?>
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