<HTML ><HEAD ><TITLE >is_int</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="Variable Functions" HREF="ref.variables.html"><LINK REL="PREVIOUS" TITLE="is_float" HREF="function.is-float.html"><LINK REL="NEXT" TITLE="is_integer" HREF="function.is-integer.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.is-float.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.is-integer.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.is-int" ></A >is_int</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN94042" ></A ><P > (PHP 3, PHP 4 )</P >is_int -- Find whether a variable is an integer</DIV ><DIV CLASS="refsect1" ><A NAME="AEN94045" ></A ><H2 >Description</H2 >bool <B CLASS="methodname" >is_int</B > ( mixed var)<BR ></BR ><P > Returns <TT CLASS="constant" ><B >TRUE</B ></TT > if <TT CLASS="parameter" ><I >var</I ></TT > is an <A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A > <TT CLASS="constant" ><B >FALSE</B ></TT > otherwise. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use <A HREF="function.is-numeric.html" ><B CLASS="function" >is_numeric()</B ></A >. </P ></BLOCKQUOTE ></DIV ><P > See also <A HREF="function.is-bool.html" ><B CLASS="function" >is_bool()</B ></A >, <A HREF="function.is-float.html" ><B CLASS="function" >is_float()</B ></A >, <A HREF="function.is-integer.html" ><B CLASS="function" >is_integer()</B ></A >, <A HREF="function.is-numeric.html" ><B CLASS="function" >is_numeric()</B ></A >, <A HREF="function.is-string.html" ><B CLASS="function" >is_string()</B ></A >, <A HREF="function.is-array.html" ><B CLASS="function" >is_array()</B ></A >, and <A HREF="function.is-object.html" ><B CLASS="function" >is_object()</B ></A >. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.is-float.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.is-integer.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >is_float</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.variables.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >is_integer</TD ></TR ></TABLE ></DIV ></BODY ></HTML >