How to extract a list of grapes from a string using preg_match

[ingteractive]

Can anyone help me output "Zinfandel|Sauvignon Blanc" from "This very nice wine is produced in California and is made from Zinfandel and Sauvignon Blanc grapes."?

Please also notice the case insensitivity. I prefer the output with capitals on first words. 

 

I created the following code :

<?php 
$ds = "Riesling|Sauvignon Blanc|Zinfandel|Muscat/i";
$string = "This very nice wine is produced in California and is made from zinfandel and Sauvignon Blanc grapes.";

echo "This is the string to extract the grapes from : ";
echo $string;
echo "<br>";

echo "These are the grapes that need to be matched in a regular expression : ";
echo $ds;
echo "<br>";

$matches = array();
$search = preg_match_all($ds, $string, $matches);

foreach ($matches[1] as $match) {
    echo $match;
	// I want this to output "Zinfandel|Sauvignon Blanc" with a pipeline between the matches
}
?>

Any help pretty much appreaciated!

[Ch0cu3r]

You need to fix you regex first.

 

All regex patterns need to be enclosed in delimiters. You have left off the opening delimiter (in your case a forward slash / )

 

As you are wanting to match complete words you'll want to wrap the list of grapes in a word boundary

$ds = "/\bRiesling|Sauvignon Blanc|Zinfandel|Muscat\b/i"; 

Finally to return the matched words in a pipe separated list you can implode $matches[0] as this will contain an array populated with the matched words. Note if a word is found more than once it will be listed again (duplicated) in the array. If you want to return each unique word found then pass $matches[0] to array_unique first before imploding the array

echo "<p>These grapes were used in the string:<br />" .  implode('|', array_unique($matches[0]));

Edited July 29, 2014 by Ch0cu3r

[ingteractive]

you rock! Exactly what I was looking for. Topic closed!