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levenshtein(PHP 4 >= 4.0.1, PHP 5, PHP 7) levenshtein — Calculate Levenshtein distance between two strings Description
int levenshtein
( string
$str1
, string $str2
)
int levenshtein
( string
$str1
, string $str2
, int $cost_ins
, int $cost_rep
, int $cost_del
)
The Levenshtein distance is defined as the minimal number of
characters you have to replace, insert or delete to transform
In its simplest form the function will take only the two
strings as parameter and will calculate just the number of
insert, replace and delete operations needed to transform
A second variant will take three additional parameters that define the cost of insert, replace and delete operations. This is more general and adaptive than variant one, but not as efficient. Parameters
Return ValuesThis function returns the Levenshtein-Distance between the two argument strings or -1, if one of the argument strings is longer than the limit of 255 characters. Examples
Example #1 levenshtein() example
<?php The above example will output: Input word: carrrot Did you mean: carrot? See Also
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