<HTML ><HEAD ><TITLE >imagecolorclosestalpha</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="Image functions" HREF="ref.image.html"><LINK REL="PREVIOUS" TITLE="imagecolorclosest" HREF="function.imagecolorclosest.html"><LINK REL="NEXT" TITLE="imagecolorclosesthwb" HREF="function.imagecolorclosesthwb.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.imagecolorclosest.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.imagecolorclosesthwb.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.imagecolorclosestalpha" ></A >imagecolorclosestalpha</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN34572" ></A ><P > (PHP 4 >= 4.0.6)</P >imagecolorclosestalpha -- Get the index of the closest color to the specified color + alpha</DIV ><DIV CLASS="refsect1" ><A NAME="AEN34575" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >imagecolorclosestalpha</B > ( resource image, int red, int green, int blue, int alpha)<BR ></BR ><P > Returns the index of the color in the palette of the image which is "closest" to the specified <SPAN CLASS="acronym" >RGB</SPAN > value and <TT CLASS="parameter" ><I >alpha</I ></TT > level. </P ><P > See also <A HREF="function.imagecolorexactalpha.html" ><B CLASS="function" >imagecolorexactalpha()</B ></A >. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B >This function was added in PHP 4.0.6 and requires GD 2.0.1</P ></BLOCKQUOTE ></DIV ></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.imagecolorclosest.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.imagecolorclosesthwb.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >imagecolorclosest</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.image.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >imagecolorclosesthwb</TD ></TR ></TABLE ></DIV ></BODY ></HTML >