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><H1
><A
NAME="function.strpos"
>strpos</A
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN26445"
></A
>strpos -- 
     Find position of first occurrence of a string.
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN26448"
></A
><H2
>Description</H2
><DIV
CLASS="funcsynopsis"
><P
></P
><CODE
CLASS="FUNCDEF"
>int strpos</CODE
>(string haystack, string needle, int 
      [<SPAN
CLASS="optional"
>offset</SPAN
>]
     );<P
></P
></DIV
><P
>&#13;     Returns the numeric position of the first occurrence of
     <TT
CLASS="parameter"
><I
>needle</I
></TT
> in the
     <TT
CLASS="parameter"
><I
>haystack</I
></TT
> string.  Unlike the
     <A
HREF="function.strrpos.html"
><B
CLASS="function"
>strrpos()</B
></A
>, this function can take a full
     string as the <TT
CLASS="parameter"
><I
>needle</I
></TT
> parameter and the
     entire string will be used.
    </P
><P
>&#13;     If <TT
CLASS="parameter"
><I
>needle</I
></TT
> is not found, returns false.
     <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
       It is easy to mistake the return values for "character found at
       position 0" and "character not found".  Here's how to detect
       the difference:
       <DIV
CLASS="informalexample"
><P
></P
><TABLE
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><TD
><PRE
CLASS="programlisting"
>  1&nbsp;
  2&nbsp;// in PHP 4.0b3 and newer:
  3&nbsp;$pos = strpos ("b", $mystring);
  4&nbsp;if ($pos === false) { // note: three equal signs
  5&nbsp;    // not found...
  6&nbsp;}
  7&nbsp;
  8&nbsp;// in versions older than 4.0b3:
  9&nbsp;$pos = strpos ("b", $mystring);
 10&nbsp;if (is_string ($pos) &#38;&#38; !$pos) {
 11&nbsp;    // not found...
 12&nbsp;}
 13&nbsp;	</PRE
></TD
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>
      </P
></BLOCKQUOTE
></DIV
>
    </P
><P
>&#13;     If <TT
CLASS="parameter"
><I
>needle</I
></TT
> is not a string, it is converted
     to an integer and applied as the ordinal value of a character.
    </P
><P
>&#13;     The optional <TT
CLASS="parameter"
><I
>offset</I
></TT
> parameter allows you
     to specify which character in <TT
CLASS="parameter"
><I
>haystack</I
></TT
> to
     start searching. The position returned is still relative to the
     the beginning of <TT
CLASS="parameter"
><I
>haystack</I
></TT
>.
    </P
><P
>&#13;     See also <A
HREF="function.strrpos.html"
><B
CLASS="function"
>strrpos()</B
></A
>,
     <A
HREF="function.strrchr.html"
><B
CLASS="function"
>strrchr()</B
></A
>, <A
HREF="function.substr.html"
><B
CLASS="function"
>substr()</B
></A
>,
     <A
HREF="function.stristr.html"
><B
CLASS="function"
>stristr()</B
></A
>, and <A
HREF="function.strstr.html"
><B
CLASS="function"
>strstr()</B
></A
>.
    </P
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