Bug #62643 [Opn->Nab]: Wrong percentage similarity

Edit report at https://bugs.php.net/bug.php?id=62643&edit=1 ID: 62643 Updated by: mike@php.net Reported by: funnyoz at hotmail dot fr Summary: Wrong percentage similarity -Status: Open +Status: Not a bug Type: Bug Package: *General Issues Operating System: Windows PHP Version: 5.4.5 Block user comment: N Private report: N New Comment: It should probably rather read: "the similarity of string b to string a" If you need a consistent result, instead of how much of string a is in string b: $percent = 100*similar_string($a,$b)/max(strlen($a),strlen($b)); Previous Comments: ------------------------------------------------------------------------ [2012-07-23 18:14:33] funnyoz at hotmail dot fr Description: ------------ If you need the function 'similar_text' to calculate the similarity in percentage between two strings, the order is important, while it must not be. (see the Test script for more information) --- From manual page: http://www.php.net/function.similar-text --- Test script: --------------- $var_1 = 'PHP IS GREAT'; $var_2 = 'WITH MYSQL'; similar_text($var_1, $var_2, $percent); echo $percent; // 27.272727272727 similar_text($var_2, $var_1, $percent); echo $percent; // 18.181818181818 Expected result: ---------------- I expect both the echo's to print : 27.272727272727 Actual result: -------------- The first echo prints : 27.272727272727 The second : 18.181818181818 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62643&edit=1