#19000 [Opn->Csd]: array_rand not returning a new set of random values on reloading the PHP page.

ID: 19000 Updated by: edink@php.net Reported By: 007@pathcom.com -Status: Open +Status: Closed Bug Type: Arrays related Operating System: Windows 2000 PHP Version: 4.2.2 New Comment: This bug has been fixed in CVS. In case this was a PHP problem, snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. In case this was a documentation problem, the fix will show up soon at http://www.php.net/manual/. In case this was a PHP.net website problem, the change will show up on the PHP.net site and on the mirror sites in short time. Thank you for the report, and for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2002-08-20 17:50:19] 007@pathcom.com PHP installed with php-4.2.2-installer.exe. The code in the manual produced a set of random values that did not change on reloading the page in IE 5.01. If however the "num_required" argument was changed in the code, a new set of random values was generated. The following code with my own "array_random()" function works perfectly. I will use this code until I see the fix for array_rand(). <html> <head> <title>Example</title> </head> <body> <pre> <?php $Array = array(array("http://www.yahoo.com","yahoo.gif","Yahoo"), array("http://www.internet.com","internet.com.gif","Internet.com"), array("http://www.cnn.com","cnn.gif","CNN"), array("http://www.php.net","php.gif","PHP"), array("http://www.google.com","google.gif","Google"), ); print_r($Array); ?> </pre> <?php #srand ((float) microtime() * 10000000); # This seeds the random number generator. function array_random($array_name,$random_elements){ global $random_key; # This is the $random_key array. $x=count($array_name)-1; # 0 to $x ($x is the number of elements in the $array_name array) is the range of the random number we will generate for each element in the $random_key array. for ($i=0;$i<$random_elements;$i++){# First we give to each element in the $random_key array a random but not necessarily unique value. $random_key[$i]=rand(0,$x); } while (count(array_unique($random_key))<count($random_key)){ # Then we check the $random_key array values for uniqueness, and keep generating random values for each index until they're all unique. for ($i=0;$i<$random_elements;$i++){ $random_key[$i]=rand(0,$x); } } print_r($random_key); print "<br>"; } array_random($Array,2); # The first argument is the array form which we want to generate x (the second argument) number of random elements; x must set to 1 or more. print "\$random_key[1] value is : $random_key[1]"; ?> <table> <tr> <td><a href="<?=$Array[$random_key[0]][0]?>"><img src="images/<?=$Array[$random_key[0]][1]?>"></a></td><td><a href="<?=$Array[$random_key[1]][0]?>"><img src="images/<?=$Array[$random_key[1]][1]?>"></a></td> </tr> <tr> <td><?=$Array[$random_key[0]][2]?></td><td><?=$Array[$random_key[1]][2]?></td> </tr> </table> </body> </html> ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=19000&edit=1