How can the use of reserved words in SQL queries impact the functionality of PHP scripts?

Using reserved words in SQL queries can cause syntax errors or unexpected behavior in PHP scripts. To avoid this issue, it is recommended to always use backticks (`) around column and table names that are reserved words in SQL queries. This ensures that the SQL query is interpreted correctly by the database. 

<?php
// Example of using backticks to escape reserved words in SQL queries
$pdo = new PDO('mysql:host=localhost;dbname=database', 'username', 'password');

// Incorrect query using reserved word without backticks
$incorrectQuery = "SELECT * FROM table WHERE order = 1";

// Correct query using backticks to escape reserved word
$correctQuery = "SELECT * FROM `table` WHERE `order` = 1";

// Execute the correct query
$stmt = $pdo->query($correctQuery);
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);

// Display the results
foreach ($results as $row) {
    echo $row['column_name'] . "<br>";
}
?>

Keywords

SQL queries reserved words functionality PHP scripts impact

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