Basic PHP
If you echo a Boolean variable, the value FALSE displays as a .... and the value TRUE echoes as a .....

blank string, 1
blank string, 2
empty variable, 1
0, 1

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Basic PHP
Under what circumstance is it impossible to assign a default value to a parameter while declaring a function?

When the function contains only one parameter
When the function is being declared as a member of a class
When the parameter is Boolean
Never
When the parameter is being declared as passed by reference

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