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URL Validation in PHP
In PHP, validating URLs can be a tedious task, especially when trying to find a reliable regular expression for the purpose. While there are multiple implementations available, it's important to note that relying on regular expressions for URL validation is generally discouraged.
Leveraging Built-in Functions
A better approach is to utilize PHP's built-in functions, specifically the filter_var() function. This function simplifies URL validation by employing the FILTER_VALIDATE_URL filter:
var_dump(filter_var('example.com', FILTER_VALIDATE_URL));
If the input string represents a valid URL, filter_var() will return the URL itself. Otherwise, it will return FALSE.
Cautionary Notes
It's worth mentioning that the aforementioned solution has limitations:
For more complex URL validation requirements, it's advisable to consider alternate solutions that address the limitations mentioned above.
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