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Using filter_var() to filter and validate
Common validation filters
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- filter_var() with validation filters return TRUE or FALSE
- FILTER_VALIDATE_EMAIL
- FILTER_VALIDATE_INT
- FILTER_VALIDATE_IP
Common sanitization filters
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- filter_var() with "sanitize" filters causes filtering to take place
- FILTER_SANITIZE_EMAIL
- FILTER_SANITIZE_NUMBER_INT
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