Bunachar Sonraí MySQL a nascadh agus a cheistiú i PHP

Is cuid riachtanach d’fhorbairt gréasáin é nascadh le bunachar sonraí MySQL agus é a cheistiú i PHP. Soláthraíonn PHP feidhmeanna agus modhanna a ligeann dúinn ceangal le bunachar sonraí MySQL, fiosrúcháin a dhéanamh, agus idirghníomhú le sonraí.

Chun ceangal le bunachar sonraí MySQL, bainimid úsáid as an mysqli_connect() nó mysqli feidhm chun nasc a bhunú agus pas a fháil i paraiméadair ar nós ainm an fhreastalaí, ainm úsáideora, pasfhocal, agus ainm bunachar sonraí. Nuair a bheidh an nasc bunaithe, is féidir linn fiosruithe SQL a rith mar SELECT, INSERT, Update, DELETE chun sonraí sa bhunachar sonraí a aisghabháil agus a ionramháil.

 

Ceangail le bunachar sonraí MySQL

<?php  
$servername = "localhost";  
$username = "your_username";  
$password = "your_password";  
$database = "your_database";  
  
// Connect to MySQL database  
$conn = mysqli_connect($servername, $username, $password, $database);  
  
// Check connection  
if(!$conn) {  
    die("Connection failed: ". mysqli_connect_error());  
}  
  
echo "Connected successfully!";  
?>  

 

Ag ceistiú Bunachar Sonraí MySQL i PHP

Tar éis nascadh go rathúil, is féidir linn ceisteanna bunachar sonraí a dhéanamh ag baint úsáide as an mysqli_query() bhfeidhm. Seo sampla de conas iarratas SELECT a dhéanamh i PHP:

<?php  
$sql = "SELECT * FROM users";  
$result = mysqli_query($conn, $sql);  
  
if(mysqli_num_rows($result) > 0) {  
    // Loop through records and display data  
    while($row = mysqli_fetch_assoc($result)) {  
        echo "ID: ". $row["id"]. "- Name: ". $row["name"]. "<br>";  
    }  
} else {  
    echo "No records found.";  
}  
  
// Free memory of query result  
mysqli_free_result($result);  
  
// Close database connection  
mysqli_close($conn);  
?>  

 

ag cur sonraí isteach i mBunachar Sonraí MySQL i PHP

Chun sonraí a chur isteach i mbunachar sonraí MySQL ag baint úsáide as PHP, úsáidimid an mysqli_query() fheidhm leis an ráiteas INSERT INTO. Seo sampla:

<?php  
$name = "John Doe";  
$email = "[email protected]";  
$age = 30;  
  
$sql = "INSERT INTO users(name, email, age) VALUES('$name', '$email', '$age')";  
  
if(mysqli_query($conn, $sql)) {  
    echo "Data inserted successfully!";  
} else {  
    echo "Error: ". mysqli_error($conn);  
}  
?>  

 

Sonraí i mbunachar sonraí MySQL a nuashonrú i PHP

Chun sonraí a nuashonrú i mbunachar sonraí MySQL ag baint úsáide as PHP, úsáidimid an mysqli_query() fheidhm leis an ráiteas UPDATE. Seo sampla:

<?php  
$id = 1;  
$newEmail = "[email protected]";  
  
$sql = "UPDATE users SET email='$newEmail' WHERE id=$id";  
  
if(mysqli_query($conn, $sql)) {  
    echo "Data updated successfully!";  
} else {  
    echo "Error: ". mysqli_error($conn);  
}  
?>  

 

Sonraí á scriosadh ó Bhunachar Sonraí MySQL i PHP

Chun sonraí a scriosadh ó bhunachar sonraí MySQL ag baint úsáide as PHP, úsáidimid an mysqli_query() fheidhm leis an ráiteas DELETE. Seo sampla

<?php  
$id = 1;  
  
$sql = "DELETE FROM users WHERE id=$id";  
  
if(mysqli_query($conn, $sql)) {  
    echo "Data deleted successfully!";  
} else {  
    echo "Error: ". mysqli_error($conn);  
}  
?>