Regular Expressions MCQ question and answer with solution | PHP Programming

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21.
What will be the output of the following PHP code? 
<?php
$number = array(0,1,two,three,four,5);
$num = preg_grep("/[0-5]/", $number);
print_r($num);
?>

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22.
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);?

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23.
Which one of the following functions is used to search a string?

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24.
What will be the output of the following PHP code? 
<?php
$name = "What is your name?"
if (preg_match("/name/"),$name)
  echo "My name is Will Pitt ";
else
  echo "My name is not Will Pitt ";
if (preg_match("/are/"))
  echo "I am great"
else
  echo "I am not great";    
?>

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26.
What will be the output of the following PHP code? 
<?php
$str = "Hello! My name is Cameron Fox. Coffee?"
$find = array('/is/','/coffee/');
$replace = array('/was/','/tea/');
echo preg_replace ($find, $replace, $str);
?>

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27.
Which one of the following preg PHP functions is used to take a string, and put it in an array?

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28.
What will be the output of the following PHP code? 
<?php
$line = "You like dogs. I hate dogs. We should marry."
$sen = preg_split('/./', $line);
print_r($sen);
?>

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29.
Which one of the following is not a preg PHP function?

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