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HOME > PHP Manual > similar_text - Calculate the similarity between two strings

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similar_text

(PHP 4, PHP 5)

similar_text — Calculate the similarity between two strings

Description

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

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.

Parameters

first: The first string.
second: The second string.
percent: By passing a reference as third argument, similar_text() will calculate the similarity in percent for you.

Return Values

Returns the number of matching chars in both strings.

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