<HTML ><HEAD ><TITLE >array_change_key_case</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Manual de PHP" HREF="index.html"><LINK REL="UP" TITLE="Funciones de matrices" HREF="ref.array.html"><LINK REL="PREVIOUS" TITLE="Funciones de matrices" HREF="ref.array.html"><LINK REL="NEXT" TITLE="array_chunk" HREF="function.array-chunk.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" >Manual de PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="ref.array.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.array-chunk.html" ACCESSKEY="N" >Siguiente</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.array-change-key-case" ></A >array_change_key_case</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN4688" ></A ><P > (PHP 4 >= 4.2.0)</P >array_change_key_case -- Returns an array with all string keys lowercased or uppercased</DIV ><DIV CLASS="refsect1" ><A NAME="AEN4691" ></A ><H2 >Description</H2 >array <B CLASS="methodname" >array_change_key_case</B > ( array input [, int case])<BR ></BR ><P > <B CLASS="function" >array_change_key_case()</B > changes the keys in the <TT CLASS="parameter" ><I >input</I ></TT > array to be all lowercase or uppercase. The change depends on the last optional <TT CLASS="parameter" ><I >case</I ></TT > parameter. You can pass two constants there, <TT CLASS="constant" ><B >CASE_UPPER</B ></TT > and <TT CLASS="constant" ><B >CASE_LOWER</B ></TT >. The default is <TT CLASS="constant" ><B >CASE_LOWER</B ></TT >. The function will leave number indices as is. </P ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN4709" ></A ><P ><B >Ejemplo 1. <B CLASS="function" >array_change_key_case()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" >$input_array = array("FirSt" => 1, "SecOnd" => 4); print_r(array_change_key_case($input_array, CASE_UPPER));</PRE ></TD ></TR ></TABLE ><P > The printout of the above program will be: <TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Array ( [FIRST] => 1 [SECOND] => 2 )</PRE ></TD ></TR ></TABLE > </P ></DIV ></TD ></TR ></TABLE ></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="ref.array.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Inicio</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.array-chunk.html" ACCESSKEY="N" >Siguiente</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Funciones de matrices</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.array.html" ACCESSKEY="U" >Subir</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >array_chunk</TD ></TR ></TABLE ></DIV ></BODY ></HTML >