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?

Analyze the following code: < ?php $string = '1, 100 or 1000?'; preg_match_all('/10*/',$string,$matches); foreach($matches[0] as $value) {echo $value; } ?> What will be the output of the above code snippet?

Which of the following PHP Regular Expression modifiers finds zero or one occurrences of a specific character in a string?

Analyze the following code: < ?php $str='This lathe turns wood.'; echo(preg_match('/\Bthe\b/', $str)); ?> 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?

Which of the following PHP Regular Expression modifiers finds any non digit character in a given string?

Suppose you pass a(bc)* as a pattern to be matched to a specified string using PHP Regular Expressions. Which of the following strings does not match the above pattern?

Suppose you pass world{2,3} as a pattern to be matched to a specified string as shown in the code snippet below: $pattern = world{2,3}; Which of the following strings does not match the above pattern?