WP_Text_Diff_Renderer_Table::compute_string_distance( string $string1, string $string2 )
Computes a number that is intended to reflect the “distance” between two strings.
Parameters
 $string1

(Required)
 $string2

(Required)
Return
(int)
Source
File: wpincludes/classwptextdiffrenderertable.php
public function compute_string_distance( $string1, $string2 ) {
// Vectors containing character frequency for all chars in each string
$chars1 = count_chars($string1);
$chars2 = count_chars($string2);
// L1norm of difference vector.
$difference = array_sum( array_map( array($this, 'difference'), $chars1, $chars2 ) );
// $string1 has zero length? Odd. Give huge penalty by not dividing.
if ( !$string1 )
return $difference;
// Return distance per character (of string1).
return $difference / strlen($string1);
}
Changelog
Version  Description 

WP2.6.0  Introduced. 