Что эквивалентно JavaScript-кодированию JavaScript в PHP?

Попробуйте rawurlencode . Или, если быть более точным:

 function encodeURIComponent($str) { $revert = array('%21'=>'!', '%2A'=>'*', '%27'=>"'", '%28'=>'(', '%29'=>')'); return strtr(rawurlencode($str), $revert); } 

Эта функция работает точно так, как определяется encodeURIComponent :

encodeURIComponent избегает всех символов, кроме следующих: буквенные, десятичные цифры, - _ . ! ~ * ' ( )

Вы попробовали urlencode ?

http_build_query

  function encodeURIComponent ($ string) {
    $ result = "";
    for ($ i = 0; $ i <strlen ($ string); $ i ++) {
       $ result. = encodeURIComponentbycharacter (urlencode ($ string [$ i]));
    }
    return $ result;
 } 

function encodeURIComponentbycharacter ($ char) {
if ($ char == "+") {return "% 20"; }
if ($ char == "% 21") {return "!"; }
if ($ char == "% 27") {return '"';}
if ($ char == "% 28") {return "(";}
if ($ char == "% 29") {return ")"; }
if ($ char == "% 2A") {return "*"; }
if ($ char == "% 7E") {return "~"; }
if ($ char == "% 80") {return "% E2% 82% AC"; }
if ($ char == "% 81") {return "% C2% 81"; }
if ($ char == "% 82") {return "% E2% 80% 9A"; }
if ($ char == "% 83") {return "% C6% 92"; }
if ($ char == "% 84") {return "% E2% 80% 9E"; }
if ($ char == "% 85") {return "% E2% 80% A6"; }
if ($ char == "% 86") {return "% E2% 80% A0"; }
if ($ char == "% 87") {return "% E2% 80% A1"; }
if ($ char == "% 88") {return "% CB% 86"; }
if ($ char == "% 89") {return "% E2% 80% B0"; }
if ($ char == "% 8A") {return "% C5% A0"; }
if ($ char == "% 8B") {return "% E2% 80% B9"; }
if ($ char == "% 8C") {return "% C5% 92"; }
if ($ char == "% 8D") {return "% C2% 8D"; }
if ($ char == "% 8E") {return "% C5% BD"; }
if ($ char == "% 8F") {return "% C2% 8F"; }
if ($ char == "% 90") {return "% C2% 90"; }
if ($ char == "% 91") {return "% E2% 80% 98"; }
if ($ char == "% 92") {return "% E2% 80% 99"; }
if ($ char == "% 93") {return "% E2% 80% 9C"; }
if ($ char == "% 94") {return "% E2% 80% 9D"; }
if ($ char == "% 95") {return "% E2% 80% A2"; }
if ($ char == "% 96") {return "% E2% 80% 93"; }
if ($ char == "% 97") {return "% E2% 80% 94"; }
if ($ char == "% 98") {return "% CB% 9C"; }
if ($ char == "% 99") {return "% E2% 84% A2"; }
if ($ char == "% 9A") {return "% C5% A1"; }
if ($ char == "% 9B") {return "% E2% 80% BA"; }
if ($ char == "% 9C") {return "% C5% 93"; }
if ($ char == "% 9D") {return "% C2% 9D"; }
if ($ char == "% 9E") {return "% C5% BE"; }
if ($ char == "% 9F") {return "% C5% B8"; }
if ($ char == "% A0") {return "% C2% A0"; }
if ($ char == "% A1") {return "% C2% A1"; }
if ($ char == "% A2") {return "% C2% A2"; }
if ($ char == "% A3") {return "% C2% A3"; }
if ($ char == "% A4") {return "% C2% A4"; }
if ($ char == "% A5") {return "% C2% A5"; }
if ($ char == "% A6") {return "% C2% A6"; }
if ($ char == "% A7") {return "% C2% A7"; }
if ($ char == "% A8") {return "% C2% A8"; }
if ($ char == "% A9") {return "% C2% A9"; }
if ($ char == "% AA") {return "% C2% AA"; }
if ($ char == "% AB") {return "% C2% AB"; }
if ($ char == "% AC") {return "% C2% AC"; }
if ($ char == "% AD") {return "% C2% AD"; }
if ($ char == "% AE") {return "% C2% AE"; }
if ($ char == "% AF") {return "% C2% AF"; }
if ($ char == "% B0") {return "% C2% B0"; }
if ($ char == "% B1") {return "% C2% B1"; }
if ($ char == "% B2") {return "% C2% B2"; }
if ($ char == "% B3") {return "% C2% B3"; }
if ($ char == "% B4") {return "% C2% B4"; }
if ($ char == "% B5") {return "% C2% B5"; }
if ($ char == "% B6") {return "% C2% B6"; }
if ($ char == "% B7") {return "% C2% B7"; }
if ($ char == "% B8") {return "% C2% B8"; }
if ($ char == "% B9") {return "% C2% B9"; }
if ($ char == "% BA") {return "% C2% BA"; }
if ($ char == "% BB") {return "% C2% BB"; }
if ($ char == "% BC") {return "% C2% BC"; }
if ($ char == "% BD") {return "% C2% BD"; }
if ($ char == "% BE") {return "% C2% BE"; }
if ($ char == "% BF") {return "% C2% BF"; }
if ($ char == "% C0") {return "% C3% 80"; }
if ($ char == "% C1") {return "% C3% 81"; }
if ($ char == "% C2") {return "% C3% 82"; }
if ($ char == "% C3") {return "% C3% 83"; }
if ($ char == "% C4") {return "% C3% 84"; }
if ($ char == "% C5") {return "% C3% 85"; }
if ($ char == "% C6") {return "% C3% 86"; }
if ($ char == "% C7") {return "% C3% 87"; }
if ($ char == "% C8") {return "% C3% 88"; }
if ($ char == "% C9") {return "% C3% 89"; }
if ($ char == "% CA") {return "% C3% 8A"; }
if ($ char == "% CB") {return "% C3% 8B"; }
if ($ char == "% CC") {return "% C3% 8C"; }
if ($ char == "% CD") {return "% C3% 8D"; }
if ($ char == "% CE") {return "% C3% 8E"; }
if ($ char == "% CF") {return "% C3% 8F"; }
if ($ char == "% D0") {return "% C3% 90"; }
if ($ char == "% D1") {return "% C3% 91"; }
if ($ char == "% D2") {return "% C3% 92"; }
if ($ char == "% D3") {return "% C3% 93"; }
if ($ char == "% D4") {return "% C3% 94"; }
if ($ char == "% D5") {return "% C3% 95"; }
if ($ char == "% D6") {return "% C3% 96"; }
if ($ char == "% D7") {return "% C3% 97"; }
if ($ char == "% D8") {return "% C3% 98"; }
if ($ char == "% D9") {return "% C3% 99"; }
if ($ char == "% DA") {return "% C3% 9A"; }
if ($ char == "% DB") {return "% C3% 9B"; }
if ($ char == "% DC") {return "% C3% 9C"; }
if ($ char == "% DD") {return "% C3% 9D"; }
if ($ char == "% DE") {return "% C3% 9E"; }
if ($ char == "% DF") {return "% C3% 9F"; }
if ($ char == "% E0") {return "% C3% A0"; }
if ($ char == "% E1") {return "% C3% A1"; }
if ($ char == "% E2") {return "% C3% A2"; }
if ($ char == "% E3") {return "% C3% A3"; }
if ($ char == "% E4") {return "% C3% A4"; }
if ($ char == "% E5") {return "% C3% A5"; }
if ($ char == "% E6") {return "% C3% A6"; }
if ($ char == "% E7") {return "% C3% A7"; }
if ($ char == "% E8") {return "% C3% A8"; }
if ($ char == "% E9") {return "% C3% A9"; }
if ($ char == "% EA") {return "% C3% AA"; }
if ($ char == "% EB") {return "% C3% AB"; }
if ($ char == "% EC") {return "% C3% AC"; }
if ($ char == "% ED") {return "% C3% AD"; }
if ($ char == "% EE") {return "% C3% AE"; }
if ($ char == "% EF") {return "% C3% AF"; }
if ($ char == "% F0") {return "% C3% B0"; }
if ($ char == "% F1") {return "% C3% B1"; }
if ($ char == "% F2") {return "% C3% B2"; }
if ($ char == "% F3") {return "% C3% B3"; }
if ($ char == "% F4") {return "% C3% B4"; }
if ($ char == "% F5") {return "% C3% B5"; }
if ($ char == "% F6") {return "% C3% B6"; }
if ($ char == "% F7") {return "% C3% B7"; }
if ($ char == "% F8") {return "% C3% B8"; }
if ($ char == "% F9") {return "% C3% B9"; }
if ($ char == "% FA") {return "% C3% BA"; }
if ($ char == "% FB") {return "% C3% BB"; }
if ($ char == "% FC") {return "% C3% BC"; }
if ($ char == "% FD") {return "% C3% BD"; }
if ($ char == "% FE") {return "% C3% BE"; }
if ($ char == "% FF") {return "% C3% BF"; }
return $ char;
}