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

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PHP Regular Expressions
What will be the output of the following PHP code?
$text = "this istsome text thatnwe might like to parse.";
print_r(split("[nt]",$text));

[0] => this is [1] => some text that [2] => we might like to parse.
Array ( [0] => some text that [1] => we might like to parse. )
Array ( [0] => this is [1] => some text that [2] => we might like to parse. )
this is some text that we might like to parse.

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