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php-manual-en-4.3.0-2mdk.noarch.rpm

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><H1
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>is_scalar</H1
><DIV
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><A
NAME="AEN94199"
></A
><P
>    (PHP 4 &#62;= 4.0.5)</P
>is_scalar&nbsp;--&nbsp;
     Finds whether a variable is a scalar
    </DIV
><DIV
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><A
NAME="AEN94202"
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><H2
>Description</H2
>bool <B
CLASS="methodname"
>is_scalar</B
> ( mixed var)<BR
></BR
><P
>&#13;     <B
CLASS="function"
>is_scalar()</B
> returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the variable
     given by the <TT
CLASS="parameter"
><I
>var</I
></TT
> parameter is a scalar,
     otherwise it returns <TT
CLASS="constant"
><B
>FALSE</B
></TT
>.
    </P
><P
>&#13;     Scalar variables are those containing an <A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>, 
     <A
HREF="language.types.float.html"
><B
CLASS="type"
>float</B
></A
>, <A
HREF="language.types.string.html"
><B
CLASS="type"
>string</B
></A
> or <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
>.  
     Types <A
HREF="language.types.array.html"
><B
CLASS="type"
>array</B
></A
>, <A
HREF="language.types.object.html"
><B
CLASS="type"
>object</B
></A
> and <A
HREF="language.types.resource.html"
><B
CLASS="type"
>resource</B
></A
> 
     or not scalar.
     <DIV
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><PRE
CLASS="php"
>function show_var($var) {
    if (is_scalar($var)) {
        echo $var;
    } else {
        var_dump($var);
    }
}
$pi = 3.1416;
$proteins = array("hemoglobin", "cytochrome c oxidase", "ferredoxin");

show_var($pi);
// prints: 3.1416

show_var($proteins)
// prints:
// array(3) {
//   [0]=&#62;
//   string(10) "hemoglobin"
//   [1]=&#62;
//   string(20) "cytochrome c oxidase"
//   [2]=&#62;
//   string(10) "ferredoxin"
// }</PRE
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>
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
      <B
CLASS="function"
>is_scalar()</B
> does not consider <A
HREF="language.types.resource.html"
><B
CLASS="type"
>resource</B
></A
>
      type values to be scalar as resources are abstract datatypes 
      which are currently based on integers. This implementation detail should 
      not be relied upon, as it may change.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     See also <A
HREF="function.is-bool.html"
><B
CLASS="function"
>is_bool()</B
></A
>,
     <A
HREF="function.is-numeric.html"
><B
CLASS="function"
>is_numeric()</B
></A
>,
     <A
HREF="function.is-float.html"
><B
CLASS="function"
>is_float()</B
></A
>,
     <A
HREF="function.is-int.html"
><B
CLASS="function"
>is_int()</B
></A
>,
     <A
HREF="function.is-real.html"
><B
CLASS="function"
>is_real()</B
></A
>,
     <A
HREF="function.is-string.html"
><B
CLASS="function"
>is_string()</B
></A
>,
     <A
HREF="function.is-object.html"
><B
CLASS="function"
>is_object()</B
></A
>,
     <A
HREF="function.is-array.html"
><B
CLASS="function"
>is_array()</B
></A
>, and
     <A
HREF="function.is-integer.html"
><B
CLASS="function"
>is_integer()</B
></A
>.
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