PHP Regular Expressions
What will be the output if we replace the line $num = preg_grep(“/[0-5]/”, $number); with $num = preg_grep(“/[0-5]/”, $number, PREG_GREP_INVERT);?

Array([0]=>0 [5]=>5)
Array([0]=>0 [1]=>1 [2]=>two [3]=>three [4]=>four [5]=>5)
Array([1]=> 1)
Array([2]=>two [3]=>three [4]=>four)

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PHP Regular Expressions
POSIX stands for

Portative Operating System Interface for Linux
Portable Operating System Interface for Unix
Portative Operating System Interface for Unix
Portable Operating System Interface for Linux

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