PHP Regular Expressions
What will be the output of the following PHP code?
$number = array(0,1,two,three,four,5);
$num = preg_grep("/[0-5]/", $number);
print_r($num);

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

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PHP Regular Expressions
What will be the output of the following PHP code?
$str = "Hello! My name is Cameron Fox. Coffee?";
$find = array('/is/','/coffee/');
$replace = array('/was/','/tea/');
echo preg_replace ($find, $replace, $str);

Hello! My name was Cameron Fox. tea?
Hello! My name was Cameron Fox. Coffee?
Hello! My name is Cameron Fox. tea?
Hello! My name is Cameron Fox. Coffee?

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PHP Regular Expressions
What will be the output of the following PHP code?
$author = "nachiketh@example.com";
$author = str_replace("a","@",$author);
echo "Contact the author of this article at $author.";

Contact the author of this article at n@chiketh@ex@mple.com
Cont@ct the @uthor of this @rticle @t n@chiketh@ex@mple.com
Contact the author of this article at nachiketh@ex@mple.com
Error

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