## Example

`

     int similar_text ( string $first , string $second [, float &$percent ] )

`

## Description

This calculates the similarity between two strings as described in Oliver [1993]. Note that this implementation does not use a stack as in Oliver's pseudo code, but recursive calls which may or may not speed up the whole process. Note also that the complexity of this algorithm is O(N**3) where N is the length of the longest string.

## Return Values

Returns the number of matching chars in both strings.