How Can I Optimize Prepared Statement Usage in PHP with MySQLi?
Dec 19, 2024 am 09:31 AM
Optimized Prepared Statement Usage in PHP with MySQLi
Your code appears to be missing the binding of parameters to the prepared statement. As per the mysqli::prepare documentation, parameter markers must be bound before executing a statement.
// Bind parameters for the first insertion
$name1 = 'one';
$age1 = 1;
$stmt->bind_param('si', $name1, $age1);
// Execute for the first insertion
$stmt->execute();
// Bind parameters for the second insertion
$name2 = 'two';
$age2 = 1;
$stmt->bind_param('si', $name2, $age2);
// Execute for the second insertion
$stmt->execute();
Advantages of mysqli
While mysqli is not the only library that supports prepared statements, it offers several advantages:
- Improved security: Prepared statements protect against SQL injection attacks by preventing the execution of arbitrary SQL queries.
- Enhanced performance: Prepared statements reuse parsed queries, leading to increased efficiency.
- Error handling: Prepared statements provide better error reporting and handling capabilities.
Complete Example with Error Handling
Here's a complete example of using prepared statements in PHP with MySQLi, including error handling:
// Database connection
$mysqli = new mysqli("localhost", "root", "root", "test");
if ($mysqli->connect_errno) {
echo "Failed to connect: " . $mysqli->connect_error;
exit;
}
// Prepare statement
$stmt = $mysqli->prepare("INSERT INTO users (name, age) VALUES (?,?)");
if (!$stmt) {
echo "Prepare failed: " . $mysqli->error;
exit;
}
// Bind parameters for the first insertion
$name1 = 'one';
$age1 = 1;
$stmt->bind_param('si', $name1, $age1);
// Execute for the first insertion
$stmt->execute();
if ($stmt->errno) {
echo "Execution failed: " . $stmt->error;
exit;
}
// Bind parameters for the second insertion
$name2 = 'two';
$age2 = 1;
$stmt->bind_param('si', $name2, $age2);
// Execute for the second insertion
$stmt->execute();
if ($stmt->errno) {
echo "Execution failed: " . $stmt->error;
exit;
}
// Selection statement
$stmt = $mysqli->prepare("SELECT * FROM users WHERE age = ?");
if (!$stmt) {
echo "Prepare failed: " . $mysqli->error;
exit;
}
// Bind parameters for selection
$age = 1;
$stmt->bind_param('i', $age);
// Execute selection
$stmt->execute();
if ($stmt->errno) {
echo "Execution failed: " . $stmt->error;
exit;
}
// Fetch results
$result = $stmt->get_result();
if (!$result) {
echo "Fetch failed: " . $stmt->error;
exit;
}
while ($row = $result->fetch_assoc()) {
echo $row['name'] . " " . $row['age'] . "<br>";
}The above is the detailed content of How Can I Optimize Prepared Statement Usage in PHP with MySQLi?. For more information, please follow other related articles on the PHP Chinese website!
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