Basic PHP
PHP considers the following values as False

constant NULL
the integer 0
All of Above
both A and B
the one-character string 0

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

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