Hi, I m new in this field. Actually I face a problem, I call a php file from a html file using javascript. I declare a variable in php file,I want to use this variable in the same html file after execution of php file.Please help.

i think you can't use a php variable in a html file...
If you want send some value from php file to html file, then put it in hidden variable at php file , and send it to html file..

If you're using JavaScript to call a PHP file, then it sounds like AJAX. In which case you would have to use the DOM to display the result of the PHP script. Please show us the script you're using.

Thank Shanti. Can u explain how can i use hidden variable in php.

see this example:

html Syntax (Toggle Plain Text)

b>TicTacToe</b><br>
Enter Move X.<br>
<pre>
<form action="tictactoe.php" method="GET">
<input type="text" name="move" size=2>
  0|x|2    <br>
  _|_|_    <br>
  3|4|o    <br>
  _|_|_    <br>
  6|7|8    <br>
</pre>
<input type="hidden" name="board" value="0x234o678">
</form>

b>TicTacToe</b><br> Enter Move X.<br> <pre> <form action="tictactoe.php" method="GET"> <input type="text" name="move" size=2> 0|x|2 <br> _|_|_ <br> 3|4|o <br> _|_|_ <br> 6|7|8 <br> </pre> <input type="hidden" name="board" value="0x234o678"> </form>