Basic PHP
The value of __NAMESPACE__ is a string that contains the current namespace name. In global, un-namespaced code, it contains . . . . . .

NULL
gibberish value
0
an empty string

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Basic PHP
strval()

None of above
Accepts a value and converts it into a string array
Accepts a value and converts it into string equivalent
Accepts a value and converts it into an string dictionary

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