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Programming PHP, 3rd Edition by Peter MacIntyre, Kevin Tatroe, Rasmus Lerdorf

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Name

assert

Synopsis

bool assert(string|bool assertion[, string description] )

If assertion is true, generates a warning in executing the code. If assertion is a string, assert() evaluates that string as PHP code. The optional second argument allows for additional text to be added in with the failure message. Check the assert_options() function to see its related connection.

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