reference/var/functions/is-int.xml
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0c9c2dd669fe9395eaa73d487fbd160f9057429a
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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.is-int" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>is_int</refname>
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<refpurpose>Find whether the type of a variable is integer</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>bool</type><methodname>is_int</methodname>
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<methodparam><type>mixed</type><parameter>var</parameter></methodparam>
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</methodsynopsis>
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<para>
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Finds whether the type of the given variable is integer.
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</para>
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<note>
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<para>
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To test if a variable is a number or a numeric string (such as form
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input, which is always a string), you must use
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<function>is_numeric</function>.
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</para>
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</note>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>var</parameter></term>
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<listitem>
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<para>
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The variable being evaluated.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns &true; if <parameter>var</parameter> is an <type>integer</type>,
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&false; otherwise.
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</para>
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</refsect1>
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<refentry xml:id="function.is-int" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>is_int</refname>
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<refpurpose>Find whether the type of a variable is integer</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>bool</type><methodname>is_int</methodname>
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<methodparam><type>mixed</type><parameter>value</parameter></methodparam>
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</methodsynopsis>
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<para>
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Finds whether the type of the given variable is integer.
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</para>
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<note>
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<para>
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To test if a variable is a number or a numeric string (such as form
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input, which is always a string), you must use
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<function>is_numeric</function>.
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</para>
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</note>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>value</parameter></term>
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<listitem>
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<para>
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The variable being evaluated.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns &true; if <parameter>value</parameter> is an <type>int</type>,
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&false; otherwise.
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<programlisting role="php">
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<![CDATA[
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<?php
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if (is_int(23)) {
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echo "is integer\n";
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} else {
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echo "is not an integer\n";
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$values = array(23, "23", 23.5, "23.5", null, true, false);
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foreach ($values as $value) {
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echo "is_int(";
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var_export($value);
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echo ") = ";
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var_dump(is_int($value));
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}
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var_dump(is_int(23));
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var_dump(is_int("23"));
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var_dump(is_int(23.5));
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var_dump(is_int(true));
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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is integer
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bool(true)
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bool(false)
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bool(false)
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bool(false)
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is_int(23) = bool(true)
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is_int('23') = bool(false)
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is_int(23.5) = bool(false)
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is_int('23.5') = bool(false)
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is_int(NULL) = bool(false)
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is_int(true) = bool(false)
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is_int(false) = bool(false)
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]]>
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</screen>
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</example>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>is_bool</function></member>
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<member><function>is_float</function></member>
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<member><function>is_numeric</function></member>
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<member><function>is_string</function></member>
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<member><function>is_array</function></member>
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<member><function>is_object</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>is_bool</function></member>
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<member><function>is_float</function></member>
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<member><function>is_numeric</function></member>
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<member><function>is_string</function></member>
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<member><function>is_array</function></member>
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<member><function>is_object</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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