note 87322 added to function.version-compare

There may be a faster way to do some of this, but I needed to take into account gamma and service pack releases. I had no need for the comparison operator functionality, so that does not exist in this version. <?php function versionCompare($v1, $v2) { //reformat v1 $v1 = str_replace(array('_','-','+'),'.',strtolower($v1)); $v1 = str_replace(array('alpha','beta','gamma'), array('a','b','g'), $v1); $v1 = preg_split("/([a-z]+)/i",$v1,-1, PREG_SPLIT_DELIM_CAPTURE); array_walk($v1, create_function('&$v', '$v = trim($v,". ");')); $v1 = explode('.',trim(implode('.',$v1),'. ')); //reformat v2 $v2 = str_replace(array('_','-','+'),'.',strtolower($v2)); $v2 = str_replace(array('alpha','beta','gamma'), array('a','b','g'), $v2); $v2 = preg_split("/([a-z]+)/i",$v2,-1, PREG_SPLIT_DELIM_CAPTURE); array_walk($v2, create_function('&$v', '$v = trim($v,". ");')); $v2 = explode('.',trim(implode('.',$v2),'. ')); //start comparison by padding sizes if (count($v1) < count($v2)) { $v1 = array_pad($v1, count($v2), '0'); } elseif (count($v1) > count($v2)) { $v2 = array_pad($v2, count($v1), '0'); } //order chart $chart = array('dev','a','b','g','rc','pl','0','sp'); foreach ($v1 as $n => $v) { //check if equal if ($v === $v2[$n]) { continue; } //check if both numbers if (preg_match("/^[0-9]+$/",$v) && preg_match("/^[0-9]+$/",$v2[$n])) { if ($v < $v2[$n]) { return -1; } if ($v > $v2[$n]) { return 1; } } //check if one number (not 0) if (preg_match("/^[0-9]+$/",$v) && $v != '0') { return 1; } if (preg_match("/^[0-9]+$/",$v2[$n]) && $v2[$n] != '0') { return -1; } //account for both being symbols (and/or zeros) if (array_search($v, $chart) < array_search($v2[$n], $chart)) { return -1; } if (array_search($v, $chart) > array_search($v2[$n], $chart)) { return 1; } return false; } return 0; //return 0 if equal } //using old function returns -1, as SP is not recognized. var_dump(version_compare("2.2.RC.2SP1","2.2.RC.2")); //using new function returns 1, as you'd expect. var_dump(versionCompare("2.2.RC.2SP1","2.2.RC.2")); ?> ---- Server IP: 209.41.74.194 Probable Submitter: 69.169.146.244 ---- Manual Page -- http://www.php.net/manual/en/function.version-compare.php Edit -- https://master.php.net/note/edit/87322 Del: integrated -- https://master.php.net/note/delete/87322/integrated Del: useless -- https://master.php.net/note/delete/87322/useless Del: bad code -- https://master.php.net/note/delete/87322/bad+code Del: spam -- https://master.php.net/note/delete/87322/spam Del: non-english -- https://master.php.net/note/delete/87322/non-english Del: in docs -- https://master.php.net/note/delete/87322/in+docs Del: other reasons-- https://master.php.net/note/delete/87322 Reject -- https://master.php.net/note/reject/87322 Search -- https://master.php.net/manage/user-notes.php