PHP URL Validation: `filter_var()` or Regular Expressions?

PHP URL Validation Using Regular Expressions or filter_var()

When validating URLs in PHP, it is recommended to utilize the filter_var() function instead of regular expressions. This is because filter_var() provides built-in functionality for verifying the validity of a URL:

var_dump(filter_var('example.com', FILTER_VALIDATE_URL)); // outputs true

However, it is important to note that this method may not be appropriate for complex validation requirements. In such cases, consider exploring alternative solutions.

While regular expressions can be used to validate URLs, it is generally discouraged due to the complexity and potential for false positives or false negatives. If you choose to use regex, proceed with caution.

Additionally, remember that unicode-safe and XSS-safe practices should always be taken into account when validating user input.

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