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><H1
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>strripos</H1
><DIV
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><A
NAME="AEN228073"
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><P
> (PHP 5)</P
>strripos --
Find position of last occurrence of a case-insensitive string in a string
</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN228076"
></A
><H2
>Description</H2
>int <B
CLASS="methodname"
>strripos</B
> ( string haystack, string needle [, int offset] )<BR
></BR
><P
> Returns the numeric position of the last occurrence of
<CODE
CLASS="parameter"
>needle</CODE
> in the
<CODE
CLASS="parameter"
>haystack</CODE
> string. Unlike
<A
HREF="function.strrpos.html"
><B
CLASS="function"
>strrpos()</B
></A
>, <B
CLASS="function"
>strripos()</B
> is
case-insensitive. Also note that string positions start at 0, and not
1.
</P
><P
> Note that the <CODE
CLASS="parameter"
>needle</CODE
> may be a string of one or
more characters.
</P
><P
> If <CODE
CLASS="parameter"
>needle</CODE
> is not found, <TT
CLASS="constant"
><B
>FALSE</B
></TT
> is returned.
</P
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><B
>警告</B
></TD
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><TR
><TD
ALIGN="LEFT"
><P
>本函数可能返回布尔值
<TT
CLASS="constant"
><B
>FALSE</B
></TT
>，但也可能返回一个与 <TT
CLASS="constant"
><B
>FALSE</B
></TT
> 等值的非布尔值，例如
<TT
CLASS="literal"
>0</TT
> 或者 ""。请参阅<A
HREF="language.types.boolean.html"
>布尔类型</A
>章节以获取更多信息。应使用
<A
HREF="language.operators.comparison.html"
>=== 运算符</A
>来测试本函数的返回值。</P
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> <TABLE
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><A
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></A
><P
><B
>例 1. A simple <B
CLASS="function"
>strripos()</B
> example</B
></P
><TABLE
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br />$haystack </font><font color="#007700">= </font><font color="#DD0000">'ababcd'</font><font color="#007700">;<br /></font><font color="#0000BB">$needle </font><font color="#007700">= </font><font color="#DD0000">'aB'</font><font color="#007700">;<br /><br /></font><font color="#0000BB">$pos </font><font color="#007700">= </font><font color="#0000BB">strripos</font><font color="#007700">(</font><font color="#0000BB">$haystack</font><font color="#007700">, </font><font color="#0000BB">$needle</font><font color="#007700">);<br /><br />if (</font><font color="#0000BB">$pos </font><font color="#007700">=== </font><font color="#0000BB">false</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"Sorry, we did not find ($needle) in ($haystack)"</font><font color="#007700">;<br />} else {<br /> echo </font><font color="#DD0000">"Congratulations!\n"</font><font color="#007700">;<br /> echo </font><font color="#DD0000">"We found the last ($needle) in ($haystack) at position ($pos)"</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
><P
> Outputs:
</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
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><TR
><TD
><PRE
CLASS="screen"
>Congratulations!
We found the last (aB) in (ababcd) at position (2)</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
</P
><P
> The <CODE
CLASS="parameter"
>offset</CODE
> parameter may be specified to begin
searching an arbitrary number of characters into the string.
</P
><P
> Negative offset values will start the search at
<CODE
CLASS="parameter"
>offset</CODE
> characters from the
<SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>start</I
></SPAN
> of the string.
</P
><P
> 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.stripos.html"
><B
CLASS="function"
>stripos()</B
></A
> and
<A
HREF="function.stristr.html"
><B
CLASS="function"
>stristr()</B
></A
>.
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