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>is_scalar</H1
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><P
> (PHP 4 >= 4.0.5)</P
>is_scalar --
Finds whether a variable is a scalar
</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN78510"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>is_scalar</B
> ( mixed var)<BR
></BR
><P
> <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
> Scalar variables are those containing an <A
HREF="language.types.html#language.types.integer"
><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="missing-stuff.html#language.types.boolean"
><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 resource
or not scalar.
<DIV
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></A
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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]=>
// string(10) "hemoglobin"
// [1]=>
// string(20) "cytochrome c oxidase"
// [2]=>
// string(10) "ferredoxin"
// }</PRE
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</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
<B
CLASS="function"
>is_scalar()</B
> does not consider resource
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
> 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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