How can error reporting and debugging techniques be used to troubleshoot PHP MySQL query issues?

To troubleshoot PHP MySQL query issues, error reporting and debugging techniques can be used to identify and resolve any errors in the query syntax or execution. By enabling error reporting and using functions like `mysqli_error()` to display specific error messages, developers can pinpoint the exact issue causing the query to fail. Additionally, debugging techniques such as `var_dump()` or `echo` can help inspect variables and values at different stages of the query execution to identify any inconsistencies or unexpected results. 

<?php
// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Connect to MySQL database
$mysqli = new mysqli('localhost', 'username', 'password', 'database');

// Check for connection errors
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

// Perform MySQL query
$query = "SELECT * FROM users WHERE id = 1";
$result = $mysqli->query($query);

// Check for query errors
if (!$result) {
    die("Query failed: " . $mysqli->error);
}

// Fetch and display results
while ($row = $result->fetch_assoc()) {
    echo "Name: " . $row['name'] . "<br>";
    echo "Email: " . $row['email'] . "<br>";
}

// Close connection
$mysqli->close();
?>

Keywords

error reporting debugging techniques PHP MySQL query issues

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