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>empty</A
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>empty -- determine whether a variable is set</DIV
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>Description</H2
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><CODE
CLASS="FUNCDEF"
>int empty</CODE
>(mixed var);<P
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>&#13;     Returns false if <TT
CLASS="parameter"
><I
>var</I
></TT
> is set and has a
     non-empty or non-zero value; true otherwise.
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>  1&nbsp;
  2&nbsp;$var = 0;
  3&nbsp;if (empty($var)) { #evaluates true 
  4&nbsp;    print '$var is either 0 or not at all set';
  5&nbsp;}
  6&nbsp;if (!isset($var)) { // evaluates false
  7&nbsp;    print 'The $var is not set at all';
  8&nbsp;}
  9&nbsp;      </PRE
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>
    </P
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>&#13;     Note that this is meaningless when used on anything which isn't a
     variable; i.e. <B
CLASS="command"
>empty (addslashes ($name))</B
> has
     no meaning since it would be checking whether something which
     isn't a variable is a variable with a false value.
    </P
><P
>&#13;     See also <A
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><B
CLASS="function"
>isset()</B
></A
> and
     <A
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><B
CLASS="function"
>unset()</B
></A
>.
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