php - Using HTML file type in JavaScript -

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does know how manage <input type="file" id="myfile" /> in javascript can send file php code?

i have this:

<input type="file" id="myfile" /> <input type="button" value="file" onclick="usefile()" /> 

then, in javascript want use file user uploaded because want use in php code.

how file , send php parameter?

function usefile() {    var myfile = document.getelementbyid("myfile"); //does work?    // how send php? } 

i hope me.

thanks lot.

can submit form? if so, it's simple. here's html:

<form method="post" action="myscript.php"> <!-- make form tag sends input (using post) php script -->     <input type="file" id="myfile" />  <!-- had above -->     <input type="submit"/>  <!-- create submit button that, when clicked, send file server , redirect page myscript.php --> </form> 

if you're not sure post is, check out site: http://www.restapitutorial.com/ , read document: http://www.mediafire.com/view/6hmhaygp099gfdh/restful_best_practices-v1_1.pdf .

however, if can't submit form, can file registering onchange handler in javascript. check out answer more info: how files <input type='file' .../> (indirect) javascript .

do have jquery on project? makes easy send files via post server. read more here: http://api.jquery.com/jquery.post/ .

if don't have jquery can use xmlhttprequest send post. page has information on how it: http://www.openjs.com/articles/ajax_xmlhttp_using_post.php , here docs xmlhttprequest: https://developer.mozilla.org/en-us/docs/web/api/xmlhttprequest

i hope helps!