The levenshtein() function is used calculate Levenshtein distance between two strings. The Levenshtein distance is the number of characters you have to replace, insert or delete to transform first string into second string. This function is not case-sensitive.
Syntax
levenshtein(str1, str2, insert, replace, delete)
Parameters
str1 − The first string to compare
str2 − The second string to compare
insert − Cost of inserting a character
replace − Cost of replacing a character
delete − Cost of deleting a character
Return
The levenshtein() function returns the Levenshtein distance between the two argument strings. It returns-1, if one of the strings exceeds 255 characters
Example
The following is an example −
<?php
echo levenshtein("Welcome","elcome");
?>
Output
1