Rewrite short JavaScript in PHP

I need a quick function rewrite from JavaScript to PHP. It has to work the same, i.e. produce the same result! If you know both of these languages, this is a fast job for you. Here's the JS script: function divisible(hash, mod) { // We will read in 4 hex at a time, but the first chunk might be a bit smaller // So ABCDEFGHIJ should be chunked like AB CDEF GHIJ var val = 0; var o = [login to view URL] % 4; for (var i = o > 0 ? o - 4 : 0; i < [login to view URL]; i += 4) { val = ((val << 16) + parseInt([login to view URL](i, i+4), 16)) % mod; } return val === 0; } var serverSeed = '70d3c5c1df37d4e728e0c904adde41420cf50a4a39e7fee9fc2d84c753679170'; var clientSeed = '0xd8b8a187d5865a733680b4bf4d612afec9c6829285d77f438cd70695fb946801'; crashPointFromHash = function(serverSeed) { var hash = [login to view URL]('sha256', serverSeed).update(clientSeed).digest('hex'); // In 1 of 101 games the game crashes instantly. if (divisible(hash, 101)) return 0; // Use the most significant 52-bit from the hash to calculate the crash point var h = parseInt([login to view URL](0,52/4),16); var e = [login to view URL](2,52); return [login to view URL]((100 * e - h) / (e - h)); };