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PHP Regular Expressions

PHP Regular Expressions
Which one of the following functions is used to search a string?

preg_match
preg_search
preg_found
preg_find

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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([1]=> 1)
Array([2]=>two [3]=>three [4]=>four)
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?
$username = "jasoN";
if (ereg("([^a-z])",$username))
echo "Username must be all lowercase!";
else
echo "Username is all lowercase!";

Error
No Output is returned
Username must be all lowercase!
Username is all lowercase!

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PHP Regular Expressions
Which one of the following preg PHP functions is used to take a string, and put it in an array?

preg_split()
preg_divide()
preg_unchain()
preg_destroy()

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

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PHP Regular Expressions
What will be the output of the following PHP code?
echo str_pad("Salad", 5)." is good.";

is good Salad
SaladSaladSaladSaladSalad is good
is good SaladSaladSaladSaladSalad
Salad is good

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