Hapa tutakwenda kutumia database yetu tuliotengeneza somolililopita. Pia tutakwend akusima data ambazo tumeingiza kutoka katika somo lililopita.
Ili kuweza kusoma data kwenye data kwenye database tutatumia SELECT . Kwa mfano tutaandika
$query = "SELECT * FROM matokeo";
$stmt = $conn->prepare($query);
$stmt->execute();
Kisha baada ya hapo tutatumia loop ili kuweza kuprint matokeo ya hizo data ambazo tume select hapo juu loop ipo nyingi lakini hapa tutakwenda kutumia loop tatu ambazoni:-
- for LOOP
- While loop
- Foreach loop
Kwa kutumia for loop:
Baada ya ku select tutatumia fetchAll() method ili kuweza kuchukuwa data kutoka kwenye database.
<?php
$dbHost = "localhost";
$dbName = "wanafunzi";
$dbUser = "root";
$dbPassword = "";
try {
$conn = new PDO("mysql:host=$dbHost;dbname=$dbName", $dbUser, $dbPassword);
// Code to read data from the database
$query = "SELECT * FROM matokeo"; // Replace 'your_table_name' with the actual table name
$stmt = $conn->prepare($query);
$stmt->execute();
// Fetch all data into an array
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
// Use a for loop to iterate through the array
for ($i = 0; $i < count($result); $i++) {
$row = $result[$i];
// Access individual columns using $row['column_name']
echo "ID: " . $row['id'] . ", Name: " . $row['jina'] . "<br>";
}
} catch (Exception $e) {
echo "Imefeli kuunganishwa";
echo $e->getMessage();
} finally {
// Close the connection
$conn = null;
}
?>
Kwa kutumia while loop:
<?php
$dbHost = "localhost";
$dbName = "wanafunzi";
$dbUser = "root";
$dbPassword = "";
try {
$conn = new PDO("mysql:host=$dbHost;dbname=$dbName", $dbUser, $dbPassword);
// Code to read data from the database
$query = "SELECT * FROM matokeo"; // Replace 'your_table_name' with the actual table name
$stmt = $conn->prepare($query);
$stmt->execute();
// Fetch data using fetch with while loop
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
// Access individual columns using $row['column_name']
echo "ID: " . $row['id'] . ", Name: " . $row['jina'] . "<br>";
}
} catch (Exception $e) {
echo "Imefeli kuunganishwa";
echo $e->getMessage();
} finally {
// Close the connection
$conn = null;
}
?>
Kwa kutumia for each loop
<?php
$dbHost = "localhost";
$dbName = "wanafunzi";
$dbUser = "root";
$dbPassword = "";
try {
$conn = new PDO("mysql:host=$dbHost;dbname=$dbName", $dbUser, $dbPassword);
// Code to read data from the database
$query = "SELECT * FROM matokeo"; // Replace 'your_table_name' with the actual table name
$stmt = $conn->prepare($query);
$stmt->execute();
// Fetch data using fetchAll
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
// You can iterate through the result and do something with each row
foreach ($result as $row) {
// Access individual columns using $row['column_name']
echo "ID: " . $row['id'] . ", Name: " . $row['jina'] . "<br>";
}
} catch (Exception $e) {
echo "Imefeli kuunganishwa";
echo $e->getMessage();
} finally {
// Close the connection
$conn = null;
}
?>
Mwisho:
Katika somo linalofuata tutakwenda kujifunza jinsi ya ku update na kuedit data kwenye database kwa kutumia PDO.
