PHP string randomization with Regular Expressions?

Hey guys,

I'm a little confused at how to approach this particular function. What I have is a string like this:

{Hello|Hi|Welcome|Good evening} thanks for {stopping by|joining us|coming by} please enjoy your stay!

Open in new window


What I'm looking for is a function that can randomly pick an element from within the { } but delimited by the |.

Example output would be:

Hi thanks for joining us please enjoy your stay!
Good evening thanks for stopping by please enjoy your stay!
Welcome thanks for coming by please enjoy your stay!
Hello thanks for joining us please enjoy your stay!

Hopefully this makes sense, can someone give me a hand?
mcaincAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

rinfoCommented:
Why not define two arrays for
$var1 = array (Hello ,Hi,Welcome,Good evening);
$var2 = array (stopping by,joining us,coming by);
then using random function pick two values between 0-3 and 0-2
$ele1 = rand(0,3);
$ele2 = rand(0.2);
now your string would be
$greet = $var1[$ele1].'  thanks for  '.$var2[$ele2] .'  please enjoy your stay!';
0
rinfoCommented:
sorry array will be
$var1 = array ('Hello' ,'Hi,Welcome','Good evening');
$var2 = array ('stopping by','joining us','coming by');
0
acbxyzCommented:
I have attached a dynamic function.
$stringtemplate = '{Hello|Hi|Welcome|Good evening} thanks for {stopping by|joining us|coming by} please enjoy your stay!';

echo string_selector($stringtemplate, 2, 1) . "<br />\n";
echo string_selector($stringtemplate) . "<br />\n";

Open in new window

exex-27656711.php
0
Rowby Goren Makes an Impact on Screen and Online

Learn about longtime user Rowby Goren and his great contributions to the site. We explore his method for posing questions that are likely to yield a solution, and take a look at how his career transformed from a Hollywood writer to a website entrepreneur.

animecycCommented:
Here is an elegant way to do what you want in PHP5:

function formatStringFromTemplate($string) {
	if(preg_match_all('/\{.+?\}/', $string, $matches)) {
		$string = str_replace($matches[0], array_map(function($set, $index) { 
			$set = trim($set);
			$set = substr($set, 1, strlen($set) - 2);
			$set = array_map('trim', explode('|', $set));
			return $set[$index > -1 ? $index : array_rand($set)];
		}, $matches[0], array_splice(func_get_args(), 1)), $string);
	}

	return $string;
}

$string = '{Hello|Hi|Welcome|Good evening} thanks for {stopping by|joining us|coming by} please enjoy your stay!';

echo formatStringFromTemplate($string, 1) . '<br />';
echo formatStringFromTemplate($string, 3, 1) . '<br />';
echo formatStringFromTemplate($string);

Open in new window


I also included the above comments ability to use a specific index on each of the sets.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
acbxyzCommented:
Two remarks on that:
- array_splice throws a warning because the function func_args_get is passed directly as argument. If you use array_slice (without "p") instead it works the same way without warning.
- When using braces for the inside of the curly braces and matches[1] at the second using, the first trim and substr can be omitted.
	if(preg_match_all('/\{(.+?)\}/', $string, $matches)) {
		$string = str_replace($matches[0], array_map(function($set, $index) { 
			$set = array_map('trim', explode('|', $set));
			return $set[$index > -1 ? $index : array_rand($set)];
		}, $matches[1], array_slice(func_get_args(), 1)), $string);
	}

Open in new window

Good solution, too.
0
mcaincAuthor Commented:
Wow thanks guys this is perfect!
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
PHP

From novice to tech pro — start learning today.