levenshtein() function in PHP

levenshtein() function is used to calculate the Levenshtein distance between two strings. Edit distance is the number of characters that must be replaced, inserted, or deleted to convert the first string into the second string. This function is not case sensitive.

grammar

levenshtein(str1, str2, insert, replace, delete)

parameter

• str1 - The first string to compare

• str2 - The second string to compare

• Insertion - Cost of inserting characters

• Replacement - Cost of replacing a character

• Delete - Cost of deleting a character

return

levenshtein() function returns the Levenshtein distance between the two parameter strings. If one of the strings exceeds 255 characters, -1

is returned

Example

The following is an example -

Live Demo

<?php
   echo levenshtein("Welcome","elcome");
?>

Output

1

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