How can syntax errors in PHP code be identified and resolved when executing SQL queries?

Syntax errors in PHP code when executing SQL queries can be identified by carefully reviewing the code for any typos, missing parentheses, or incorrect syntax. To resolve these errors, ensure that the SQL query is properly formatted with the correct syntax and variables are properly concatenated or bound to the query.

// Example code snippet to identify and resolve syntax errors in PHP code executing SQL queries
$query = "SELECT * FROM users WHERE id = $user_id"; // incorrect syntax with missing quotes around $user_id

// Corrected query with proper syntax
$query = "SELECT * FROM users WHERE id = '$user_id'";