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>urlencode</TITLE
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><H1
><A
NAME="function.urlencode"
>urlencode</A
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NAME="AEN38525"
></A
><P
>    (PHP3 , PHP4 )</P
>urlencode&nbsp;--&nbsp;URL-encodes string</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN38528"
></A
><H2
>Description</H2
><DIV
CLASS="funcsynopsis"
><A
NAME="AEN38530"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>string <B
CLASS="function"
>urlencode</B
></CODE
> (string str)</CODE
></P
><P
></P
></DIV
><P
>&#13;     Returns a string in which all non-alphanumeric characters except
     <TT
CLASS="literal"
>-_.</TT
> have been replaced with a percent
     (<TT
CLASS="literal"
>%</TT
>) sign followed by two hex digits and spaces
     encoded as plus (<TT
CLASS="literal"
>+</TT
>) signs.  It is encoded the
     same way that the posted data from a WWW form is encoded, that is
     the same way as in
     <TT
CLASS="literal"
>application/x-www-form-urlencoded</TT
> media type.
     This differs from the RFC1738 encoding (see
     <A
HREF="function.rawurlencode.html"
><B
CLASS="function"
>rawurlencode()</B
></A
>) in that for historical
     reasons, spaces are encoded as plus (+) signs.  This function is
     convenient when encoding a string to be used in a query part of
     an URL, as a convenient way to pass variables to the next page:
     <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN38542"
></A
><P
><B
>Example 1. <B
CLASS="function"
>Urlencode()</B
> example</B
></P
><TABLE
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WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
>&#13;echo '&#60;A HREF="mycgi?foo=', urlencode ($userinput), '"&#62;';
      </PRE
></TD
></TR
></TABLE
></DIV
></TD
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></TABLE
>
    </P
><P
>Note: Be careful about variables that may match HTML entities.  
	Things like &#38;amp, &#38;copy and &#38;pound are parsed by the browser
	and the actual entity is used instead of the desired variable name.  This 
	is an obvious hassle that the W3C has been telling people about for years.
	The reference is here: <A
HREF="http://www.w3.org/TR/html4/appendix/notes.html#h-B.2.2"
TARGET="_top"
>http://www.w3.org/TR/html4/appendix/notes.html#h-B.2.2</A
>
	PHP supports changing the argument separator to the W3C-suggested
	semi-colon through the arg_separator .ini directive.  Unfortunately most
	user agents do not send form data in this semi-colon separated format.
	A more portable way around this is to use &#38;amp; instead of &#38; as the
    separator.  You don't need to change PHP's arg_separator for this.  Leave
	it as &#38;, but simply encode your URLs using <A
HREF="function.htmlentities.html"
><B
CLASS="function"
>htmlentities()</B
></A
>(urlencode($data)).
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><DIV
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><A
NAME="AEN38549"
></A
><P
><B
>Example 2. <B
CLASS="function"
>Urlencode/htmlentities()</B
> example</B
></P
><TABLE
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BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
>&#13;echo '&#60;A HREF="mycgi?foo=', htmlentities (urlencode ($userinput) ), '"&#62;';
      </PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
	</P
><P
>&#13;     See also <A
HREF="function.urldecode.html"
><B
CLASS="function"
>urldecode()</B
></A
>,
		          <A
HREF="function.htmlentities.html"
><B
CLASS="function"
>htmlentities()</B
></A
>,
		          <A
HREF="function.rawurldecode.html"
><B
CLASS="function"
>rawurldecode()</B
></A
>,
							<A
HREF="function.rawurlencode.html"
><B
CLASS="function"
>rawurlencode()</B
></A
>.
    </P
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