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Possible Duplicate:
How do the equality (== double equals) and identity (=== triple equals) comparison operators differ?
if (filter_input(INPUT_GET, "email", FILTER_VALIDATE_EMAIL) === 0)
or
if (filter_input(INPUT_GET, "email", FILTER_VALIDATE_EMAIL) == 0)
Should I use == or === here?
Where can I use ===?
In PHP double equals matches only VALUE
Triple equals matches VALUE AND TYPE