What best practices should be followed when constructing a DELETE query in PHP to avoid syntax errors?

When constructing a DELETE query in PHP, it is important to properly concatenate the query string to avoid syntax errors. One common mistake is forgetting to include single quotes around string values in the query. To prevent this issue, it is recommended to use prepared statements with placeholders for values to ensure proper escaping and quoting. Example PHP code snippet: 

// Assuming $conn is the database connection object

// Prepare the DELETE query using a placeholder for the value
$stmt = $conn->prepare("DELETE FROM table_name WHERE id = :id");

// Bind the actual value to the placeholder
$id = 123;
$stmt->bindParam(':id', $id, PDO::PARAM_INT);

// Execute the query
$stmt->execute();

Keywords

SQL injection prepared statements PDO error handling query validation

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