Passing javascript variable into php code without using GET parameters?

is there any way to get js variable in php, i try something funny like this:

<script>
var x = "random text";
alert("aaa<?php echo md5(;?>"+x+"<?php); ?>");
</script>

Of course it gives me error.

Parse error: parse error, expecting `')'' in X:XXX\index.php on line XXX

If there is a way without refreshing the page or us开发者_如何学运维ing GET parameters, please let me know. Thanks

EDIT:

What I am trying to do is: hash(md5 inside php) the javascript variable.

PHP runs at the server, JavaScript runs at the client (browser). The only way you can pass a variable from JavaScript to PHP is sending it via an AJAX request.

There are several MD5 solutions out there for JavaScript, but it's not the same if you want the variable hashed before it reaches the user.

You can't do it like that because PHP builds the page before javascript is initialized. You'll have to do an AJAX request.

<script type="text/javascript" 
src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
var x = "random text"
$.post('md5.php', {md5:x}, function(data) {
  alert(data);
});
</script>

<?php
  echo md5($_POST['md5']);
?>

Or..

function md5(e){function k(h,i){var g=[h&2147483648,i&2147483648,h&1073741824,i&1073741824,(h&1073741823)+(i&1073741823)];if(g[2]&g[3])return g[4]^2147483648^g[0]^g[1];return g[2]|g[3]?g[4]&1073741824?g[4]^3221225472^g[0]^g[1]:g[4]^1073741824^g[0]^g[1]:g[4]^g[0]^g[1]}function n(h,i,g,j,s,m,o){h=k(h,k(k(i&g|~i&j,s),o));return k(h<<m|h>>>32-m,i)}function p(h,i,g,j,s,m,o){h=k(h,k(k(i&j|g&~j,s),o));return k(h<<m|h>>>32-m,i)}function q(h,i,g,j,s,m,o){h=k(h,k(k(i^g^j,s),o));return k(h<<m|h>>>32-m,i)}function r(h,i,g,j,s,m,o){h=k(h,k(k(g^(i|~j),s),o));return k(h<<m|h>>>32-m,i)}function t(h){var i="",g,j;for(j=0;j<=3;j++){g="0"+(h>>>j*8&255).toString(16);i+=g.substr(g.length-2,2)}return i}var f=[],v,w,x,y,a,b,c,d;e=function(h){var i=h.length,g=0,j=0,s="",m;for(m=0;m<i;m++){var o=h.charCodeAt(m),u=null;if(o<128)j++;else u=o>127&&o<2048?String.fromCharCode(o>>6|192,o&63|128):String.fromCharCode(o>>12|224,o>>6&63|128,o&63|128);if(u!==null){if(j>g)s+=h.substring(g,j);s+=u;g=j=m+1}}if(j>g)s+=h.substring(g,h.length);return s}(e);f=function(h){var i=h.length,g=i+8;g=((g-g%64)/64+1)*16;var j=Array(g-1);for(l=0;l<i;l++)j[(l-l%4)/4]|=h.charCodeAt(l)<<l%4*8;j[(l-l%4)/4]|=128<<l%4*8;j[g-2]=i<<3;j[g-1]=i>>>29;return j}(e);d=271733878;a=1732584193;b=4023233417;c=2562383102;for(e=0;e<f.length;e+=16){v=a;w=b;x=c;y=d;a=n(a,b,c,d,f[e+0],7,3614090360);d=n(d,a,b,c,f[e+1],12,3905402710);c=n(c,d,a,b,f[e+2],17,606105819);b=n(b,c,d,a,f[e+3],22,3250441966);a=n(a,b,c,d,f[e+4],7,4118548399);d=n(d,a,b,c,f[e+5],12,1200080426);c=n(c,d,a,b,f[e+6],17,2821735955);b=n(b,c,d,a,f[e+7],22,4249261313);a=n(a,b,c,d,f[e+8],7,1770035416);d=n(d,a,b,c,f[e+9],12,2336552879);c=n(c,d,a,b,f[e+10],17,4294925233);b=n(b,c,d,a,f[e+11],22,2304563134);a=n(a,b,c,d,f[e+12],7,1804603682);d=n(d,a,b,c,f[e+13],12,4254626195);c=n(c,d,a,b,f[e+14],17,2792965006);b=n(b,c,d,a,f[e+15],22,1236535329);a=p(a,b,c,d,f[e+1],5,4129170786);d=p(d,a,b,c,f[e+6],9,3225465664);c=p(c,d,a,b,f[e+11],14,643717713);b=p(b,c,d,a,f[e+0],20,3921069994);a=p(a,b,c,d,f[e+5],5,3593408605);d=p(d,a,b,c,f[e+10],9,38016083);c=p(c,d,a,b,f[e+15],14,3634488961);b=p(b,c,d,a,f[e+4],20,3889429448);a=p(a,b,c,d,f[e+9],5,568446438);d=p(d,a,b,c,f[e+14],9,3275163606);c=p(c,d,a,b,f[e+3],14,4107603335);b=p(b,c,d,a,f[e+8],20,1163531501);a=p(a,b,c,d,f[e+13],5,2850285829);d=p(d,a,b,c,f[e+2],9,4243563512);c=p(c,d,a,b,f[e+7],14,1735328473);b=p(b,c,d,a,f[e+12],20,2368359562);a=q(a,b,c,d,f[e+5],4,4294588738);d=q(d,a,b,c,f[e+8],11,2272392833);c=q(c,d,a,b,f[e+11],16,1839030562);b=q(b,c,d,a,f[e+14],23,4259657740);a=q(a,b,c,d,f[e+1],4,2763975236);d=q(d,a,b,c,f[e+4],11,1272893353);c=q(c,d,a,b,f[e+7],16,4139469664);b=q(b,c,d,a,f[e+10],23,3200236656);a=q(a,b,c,d,f[e+13],4,681279174);d=q(d,a,b,c,f[e+0],11,3936430074);c=q(c,d,a,b,f[e+3],16,3572445317);b=q(b,c,d,a,f[e+6],23,76029189);a=q(a,b,c,d,f[e+9],4,3654602809);d=q(d,a,b,c,f[e+12],11,3873151461);c=q(c,d,a,b,f[e+15],16,530742520);b=q(b,c,d,a,f[e+2],23,3299628645);a=r(a,b,c,d,f[e+0],6,4096336452);d=r(d,a,b,c,f[e+7],10,1126891415);c=r(c,d,a,b,f[e+14],15,2878612391);b=r(b,c,d,a,f[e+5],21,4237533241);a=r(a,b,c,d,f[e+12],6,1700485571);d=r(d,a,b,c,f[e+3],10,2399980690);c=r(c,d,a,b,f[e+10],15,4293915773);b=r(b,c,d,a,f[e+1],21,2240044497);a=r(a,b,c,d,f[e+8],6,1873313359);d=r(d,a,b,c,f[e+15],10,4264355552);c=r(c,d,a,b,f[e+6],15,2734768916);b=r(b,c,d,a,f[e+13],21,1309151649);a=r(a,b,c,d,f[e+4],6,4149444226);d=r(d,a,b,c,f[e+11],10,3174756917);c=r(c,d,a,b,f[e+2],15,718787259);b=r(b,c,d,a,f[e+9],21,3951481745);a=k(a,v);b=k(b,w);c=k(c,x);d=k(d,y)}return(t(a)+t(b)+t(c)+t(d)).toLowerCase()};
var x = "random text";
alert(md5(x));

You could use an ajax call to your server and have a webservice on the php side returning the information you need. Besides that? I don't think there is a way expect for refreshing.