similar_text
(PHP 4, PHP 5, PHP 7)
similar_text — Calculate the similarity between two strings
Opis
similar_text
( string $first
, string $second
[, float &$percent
] ) : int
Parametry
-
first
-
The first string.
-
second
-
The second string.
Informacja:
Swapping the first
and
second
may yield a different result; see the
example below.
-
percent
-
By passing a reference as third argument,
similar_text() will calculate the similarity in
percent, by dividing the result of similar_text() by
the average of the lengths of the given strings times
100.
Zwracane wartości
Returns the number of matching chars in both strings.
The number of matching characters is calculated by finding the longest first
common substring, and then doing this for the prefixes and the suffixes,
recursively. The lengths of all found common substrings are added.
Przykłady
Przykład #1 similar_text() argument swapping example
This example shows that swapping the first
and
second
argument may yield different results.
<?php
$sim = similar_text('bafoobar', 'barfoo', $perc);
echo "similarity: $sim ($perc %)\n";
$sim = similar_text('barfoo', 'bafoobar', $perc);
echo "similarity: $sim ($perc %)\n";
Powyższy przykład wyświetli coś
podobnego do:
similarity: 5 (71.428571428571 %)
similarity: 3 (42.857142857143 %)
Zobacz też:
- levenshtein() - Calculate Levenshtein distance between two strings
- soundex() - Calculate the soundex key of a string