ID: 40924 User updated by: info at e-mhd dot com Reported By: info at e-mhd dot com -Status: Bogus +Status: Closed Bug Type: Performance problem Operating System: Win & Linux PHP Version: 5.2.1 New Comment:
Thank you for your reply. Previous Comments: ------------------------------------------------------------------------ [2007-03-26 17:11:02] [EMAIL PROTECTED] Floating point values have a limited precision. Hence a value might not have the same string representation after any processing. That also includes writing a floating point value in your script and directly printing it without any mathematical operations. If you would like to know more about "floats" and what IEEE 754 is read this: http://docs.sun.com/source/806-3568/ncg_goldberg.html Thank you for your interest in PHP. . ------------------------------------------------------------------------ [2007-03-26 16:52:36] info at e-mhd dot com Description: ------------ Problem with function round() rounded value is incorrect Reproduce code: --------------- ini_set("precision", 15); bcscale(5); $a1 = (string)(3845349 * 34.065); $a2 = (float)(3845349 * 34.065); $a3 = bcmul(3845349, 34.065); echo "A1 = "; var_dump($a1); echo("<br />"); echo "A2 = "; var_dump($a2); echo("<br />"); echo "A3 = "; var_dump($a3); echo "<br />Values after round() :"; echo "<br />A1 = ".round( $a1 ,2); echo "<br />A2 = ".round( $a2 ,2); echo "<br />A3 = ".round( $a3 ,2); Expected result: ---------------- A1 = string(13) "130991813.685" A2 = float(130991813.685) A3 = string(13) "130991813.685" Values after round() : A1 = 130991813.69 A2 = 130991813.69 A3 = 130991813.69 Actual result: -------------- A1 = string(13) "130991813.685" A2 = float(130991813.685) A3 = string(13) "130991813.685" Values after round() : A1 = 130991813.69 A2 = 130991813.68 A3 = 130991813.69 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=40924&edit=1
