National_Instruments

200-500 · Question #180

Which sentence describes the following regular expression match? preg_match('/^\d*(?:\.[0-9]+)?$/', $test);

The correct answer is B. It matches float numbers without thousand separators. See the full explanation below for the reasoning.

Question

Which sentence describes the following regular expression match? preg_match('/^\d*(?:.[0-9]+)?$/', $test);

Options

AIt matches float numbers with thousand separators.
BIt matches float numbers without thousand separators.
CIt matches binary integer numbers.
DIt matches any string.
EIt does not match anything

How the community answered

(50 responses)

A
4% (2)
B
72% (36)
C
16% (8)
D
2% (1)
E
6% (3)

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