how to resolve Undefined index error?

hey guys i got following error Undefined index: hname in C:\Temp\5Aug2010\job.php on line 38

this error occur in insert command i use

'".mysql_real_escape_string($_POST['hname'])."'

where hname is a textbox field on form

if i use

'".mysql_real_escape_string((isset($_PO开发者_StackOverflow中文版ST['hname'])))."'

then error will gone but in database it show empty field.

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If you need to stay inside that string you quote, use

 ".(!empty($_POST['hname']) ? mysql_real_escape_string($_POST['hname']) : null)."

but for readability's sake, it would be nicer to do before outputting the string:

 if (!empty($_POST['hname']))
  $hname = mysql_real_escape_string($_POST['hname']);
 else
  $hname = null;