What are the potential drawbacks of relying solely on regular expressions for complex parsing tasks in PHP?

Relying solely on regular expressions for complex parsing tasks in PHP can lead to unreadable and unmaintainable code, as regex patterns can quickly become convoluted and difficult to understand. Additionally, regular expressions may not be the most efficient solution for all parsing tasks, especially when dealing with nested structures or complex data formats. To address this issue, consider using a combination of regular expressions and built-in PHP functions for parsing tasks, as this approach can improve code readability and performance.

// Example of using regular expressions and PHP functions for parsing tasks

// Sample data to parse
$data = "Name: John Doe, Age: 30, Occupation: Programmer";

// Define regular expressions for extracting specific data
preg_match('/Name: (.*?),/', $data, $nameMatches);
preg_match('/Age: (.*?),/', $data, $ageMatches);
preg_match('/Occupation: (.*?)$/', $data, $occupationMatches);

// Extract data using PHP functions
$name = $nameMatches[1];
$age = $ageMatches[1];
$occupation = $occupationMatches[1];

// Output parsed data
echo "Name: $name, Age: $age, Occupation: $occupation";