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php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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>stripos</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN227597"
></A
><P
>    (PHP 5)</P
>stripos&nbsp;--&nbsp;
     Find position of first occurrence of a case-insensitive string
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN227600"
></A
><H2
>Description</H2
>int <B
CLASS="methodname"
>stripos</B
> ( string haystack, string needle [, int offset] )<BR
></BR
><P
>&#13;     Returns the numeric position of the first occurrence of
     <CODE
CLASS="parameter"
>needle</CODE
> in the <CODE
CLASS="parameter"
>haystack</CODE
>
     <A
HREF="language.types.string.html"
><B
CLASS="type"
>string</B
></A
>.  Unlike <A
HREF="function.strpos.html"
><B
CLASS="function"
>strpos()</B
></A
>, 
     <B
CLASS="function"
>stripos()</B
> is case-insensitive.
    </P
><P
>&#13;     Note that the <CODE
CLASS="parameter"
>needle</CODE
> may be a string of one or
     more characters.
    </P
><P
>&#13;     If <CODE
CLASS="parameter"
>needle</CODE
> is not found,
     <B
CLASS="function"
>stripos()</B
> will return <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
> <TT
CLASS="constant"
><B
>FALSE</B
></TT
>.
    </P
><DIV
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><P
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><B
>警告</B
></TD
></TR
><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
></TD
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><P
>&#13;     <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN227635"
></A
><P
><B
>例 1. <B
CLASS="function"
>stripos()</B
> examples</B
></P
><TABLE
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$findme&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#007700">= </font><font color="#DD0000">'a'</font><font color="#007700">;<br /></font><font color="#0000BB">$mystring1 </font><font color="#007700">= </font><font color="#DD0000">'xyz'</font><font color="#007700">;<br /></font><font color="#0000BB">$mystring2 </font><font color="#007700">= </font><font color="#DD0000">'ABC'</font><font color="#007700">;<br /><br /></font><font color="#0000BB">$pos1 </font><font color="#007700">= </font><font color="#0000BB">stripos</font><font color="#007700">(</font><font color="#0000BB">$mystring1</font><font color="#007700">, </font><font color="#0000BB">$findme</font><font color="#007700">);<br /></font><font color="#0000BB">$pos2 </font><font color="#007700">= </font><font color="#0000BB">stripos</font><font color="#007700">(</font><font color="#0000BB">$mystring2</font><font color="#007700">, </font><font color="#0000BB">$findme</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// Nope, 'a' is certainly not in 'xyz'<br /></font><font color="#007700">if (</font><font color="#0000BB">$pos1 </font><font color="#007700">=== </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"The string '$findme' was not found in the string '$mystring1'"</font><font color="#007700">;<br />}<br /><br /></font><font color="#FF8000">// Note our use of ===.&nbsp;&nbsp;Simply == would not work as expected<br />// because the position of 'a' is the 0th (first) character.<br /></font><font color="#007700">if (</font><font color="#0000BB">$pos2 </font><font color="#007700">!== </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"We found '$findme' in '$mystring2' at position $pos2"</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
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>
    </P
><P
>&#13;     If <CODE
CLASS="parameter"
>needle</CODE
> is not a string, it is converted
     to an integer and applied as the ordinal value of a character.
    </P
><P
>&#13;     The optional <CODE
CLASS="parameter"
>offset</CODE
> parameter allows you
     to specify which character in <CODE
CLASS="parameter"
>haystack</CODE
> to
     start searching. The position returned is still relative to the
     beginning of <CODE
CLASS="parameter"
>haystack</CODE
>.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>本函数可安全用于二进制对象。</P
></BLOCKQUOTE
></DIV
><P
>&#13;     See also <A
HREF="function.strpos.html"
><B
CLASS="function"
>strpos()</B
></A
>, <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
>, <A
HREF="function.strstr.html"
><B
CLASS="function"
>strstr()</B
></A
>,
     <A
HREF="function.strripos.html"
><B
CLASS="function"
>strripos()</B
></A
> and <A
HREF="function.str-ireplace.html"
><B
CLASS="function"
>str_ireplace()</B
></A
>.
    </P
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