Query string for Curl PHP a form without action

Query string for Curl PHP a form without action

Write query string for Curl PHP
<form action="" method="post" class="dm_signin_form" onsubmit='return
confirmDialogfrmF();'>
<br>
<innput type="text" name="signin[username]" class="field required"
id="signin_username"/>
<br>
<input maxlength="100" autocomplete="off" type="password"
name="signin[password]" class="field required" id="signin_password" />
</td><br>
<input value="" type="submit" class="signinbtn submit" />