Correct Answer: +
Explanation:
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Analyze the following code snippet that uses the preg_last_error() PHP Regular Expression method: < ?php preg_match('/(?:\D+|<\d+>)*[!?]/', 'foobar foobar foobar'); if (preg_last_error() == PREG_BACKTRACK_LIMIT_ERROR) { echo 'Backtrack limit was exhausted!'; } ?> What will be the output of the above code?
Suppose you use [hc]+at for pattern matching as a Regular Expression. Which of the following patterns does not match the above expression?
What is the [\b] PHP Regular Expression modifier used for?
Suppose you pass '^.{3}$' as a pattern to be matched to a specified string using PHP Regular Expressions. Which of the following strings match the above pattern?
Analyze the following code snippet that uses the preg_replace() PHP Regular Expression method: < ?php $string = 'This is the {_FOO_} brought to you by {_BAR_}'; $template_vars=array('FOO' => 'The PHP Way', 'BAR' => 'PHPro.orG'); $string = preg_replace('/{_(.*?)_}/ime', '\$template_vars['$1']',$string); echo $string; ?> What will be the output of the above code?
Which of the following characters is not matched by a Regular Expression when a .(dot) character is set?
Analyze the following code snippet that uses the preg_quote() PHP Regular Expression method: < ?php $keywords = '$40 for a g3/400'; $keywords = preg_quote($keywords, '/'); echo $keywords; ?> What will be the output of the above code?
Analyze the following code snippet used to check the password strength: < ?php $password = 'Fyfjk34sdfjfsjq7'; if (preg_match('/^.*(?=.{8,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*$/', $password)) { echo 'Your passwords is strong.'; } else { echo 'Your password is weak.'; } ?> What will be the output of the above code snippet?
Analyze the following code snippet that uses the preg_replace() PHP Regular Expression method: What will be the output of the above code snippet?
Which of the following statements are true about the \b PHP Regular Expression modifier?