javascript - Converting a simple function from jS to PHP -

i have simple function hash function in js i'm struggeling converting php (for server side validation), simple math function, , i'm not php expert, of shed light why can't have ($variable)(function) in php next each other?

here function in js:

function claculate(a,b){     var g=function(a){       return math.round(a/math.pow(10,math.round(math.log10e*math.log(a)))*10)     };     var f=function(a){         var h=function(b){             return b(a)         };         var j=function(b){             return g(a)         };          return a<b?j:h      };      var o=((f(a)(g)%2)||(f(a*b)(g)%7*1/7)||11)^f(b)(g);      return another_function(a,o);   } 

and here version in php, there error on $o line, , i'm not sure why ...

function claculate($a, $b){    $g = function ($r){        return round($r / pow(10, round(m_log10e * log($r))) * 10);    };    $f = function ($a) use (&$a, &$b, &$g) {        $h = function ($b) use (&$b, &$a) {            return $b($a);         };         $j = function ($b) use (&$b, &$g, &$a) {            return $g($a);         };         return ($a < $b) ? $j : $h;     };     // $o throws error     $o = $f($a)($g) % 2 || $f($a * $b)($g) % 7 * 1 / 7 || 11 ^ $f($b)($g);     return another_function($a, $o); } 

any thoughts or right direction more welcomed!

in general, works same:

function g($r) {   return round($r / pow(10, round(m_log10e * log($r))) * 10); }  function claculate($a, $b) {   $o = ((g($a) % 2) || (g($a * $b) % 7 * 1 / 7) || 11) ^ g($b); } 

the first problem in difference when evaluating or statement. (js returns number, php bool.) can solved using of conditions.

the worst js uses 2 more digits real numbers.