help needed

$string = 'opel bmw mercedes audi chrysler audi';
$keyword = 'audi';

PHP:

How do I output just the number of occurences for audi in that string please (should be 2) ?

Thanks.

 

Have a look at substr_count() and preg_match_all().

 

The most easiest way especially for PHP beginners:

str_word_count()

PHP:

 

That was quick. Thank you. Here's what I did:

Let me know if it's ok:

preg_match_all ( '/('.$keyword.')/', $string, $matches, PREG_PATTERN_ORDER );
echo count($matches[0]);

PHP:

 

2 things.

If your $keyword contains special characters, you should use preg_quote() on it.

preg_match_all ( '/('. preg_quote($keyword, '/') .')/', $string, $matches, PREG_PATTERN_ORDER );

PHP:

Second, preg_match_all() returns the number of full pattern matches. So you can directly do this:

$amount = preg_match_all ( '/'. preg_quote($keyword, '/') .'/', $string, $matches);
echo $amount;

PHP:

(No need for the grouping either)

It's slightly faster.


Also, you can use the i modifier to make it case-insensitive, if wanted.

 

Thanks nico