substr_count and an array as a needle

How to use substr_count with an array as a needle. Like this:

开发者_StackOverflow中文版substr_count($str, array('find_this', 'or_find_this'));

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You could use implode() to create a string of the array and create a regex kind of thing.

$array = array('find_this', 'or_find_this');
$string = implode('|', $array);
$count = count(preg_grep("/($string)/", $str));
echo $count;

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You'll need to loop through them and add the substr_count() to the total count. A ready example is in the php manual page,

http://www.php.net/manual/en/function.substr-count.php#74952