How to write PHP functions

How to write PHP functions

JScript Code

  function decode (C) {var digi=16;        var add= 10;        var plus=7;        var cha=36;        var I =-1;        var H = 0;        var B = "";        var J = c.length;        var G = c.charcodeat (J-1);        C = c.substring (0, J-1);        j--; for (var E = 0; E < J;            e++) {var D = parseint (C.charat (E), cha)-add;            if (d >= add) {d = d-plus} B + = (d). toString (CHA);                if (D > H) {I = E;        H = D}} var A = parseint (b.substring (0, I), Digi);        var F = parseint (b.substring (I + 1), Digi);        var L = (A + f-parseint (G))/2;        var K = (f-l)/100000;        L/= 100000; return {lat:k, lng:l}}document.write (decode (' Hhdfjgzvvihijg '). lat+ ', ' +decode (' HHDFJGZVVIH IJG '). LNG);

The function of this JS function ... How to write in PHP? Thank you, this function run result: 39.09917,117.22348

------Solution--------------------
Literal translation can

PHP Code

Print_r (Decode (' HHDFJGZVVIHIJG ')), function decode ($C) {  $digi = +;  $add = ten;  $plus = 7;  $cha =;  $I =-1;  $H = 0;  $B = "";  $J = strlen ($C);  $G = Ord ($C {$J-1});  $C = substr ($C, 0,-1);  $J--;  for ($E = 0; $E < $J; $E + +) {    $D = Base_convert ($C {$E}, $cha, ten)-$add;    if ($D >= $add) {      $D = $D-$plus;    }    $B. = Base_convert ($D, ten, $cha);    if ($D > $H) {      $I = $E;      $H = $D;    }  }  $A = Base_convert (substr ($B, 0, $I), $digi, ten);  $F = Base_convert (substr ($B, $I + 1), $digi, ten);  $L = ($A + $F-$G)/2;  $K = ($F-$L)/100000;  $L/= 100000;  Return array (' lat ' = = $K, ' lng ' = $L);}
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