Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

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

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>strspn</H1
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>    (PHP 3 &#62;= 3.0.3, PHP 4, PHP 5)</P
>strspn&nbsp;--&nbsp;
     Find length of initial segment matching mask
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><H2
>Description</H2
>int <B
CLASS="methodname"
>strspn</B
> ( string str1, string str2 [, int start [, int length]] )<BR
></BR
><P
>&#13;     Returns the length of the initial segment of
     <CODE
CLASS="parameter"
>str1</CODE
> which consists entirely of characters
     in <CODE
CLASS="parameter"
>str2</CODE
>.
    </P
><P
>&#13;     The line of code:
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$var </font><font color="#007700">= </font><font color="#0000BB">strspn</font><font color="#007700">(</font><font color="#DD0000">"42 is the answer, what is the question ..."</font><font color="#007700">, </font><font color="#DD0000">"1234567890"</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
     will assign 2 to <CODE
CLASS="varname"
>$var</CODE
>, because the string "42" will
     be the longest segment containing characters from "1234567890".
    </P
><P
>&#13;     As of PHP 4.3.0, <B
CLASS="function"
>strspn()</B
> accepts two optional 
     <A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
> parameters that can be used to define the 
     <CODE
CLASS="parameter"
>start</CODE
> position and the 
     <CODE
CLASS="parameter"
>length</CODE
> of the string to examine.
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#007700">echo </font><font color="#0000BB">strspn</font><font color="#007700">(</font><font color="#DD0000">"foo"</font><font color="#007700">, </font><font color="#DD0000">"o"</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">); </font><font color="#FF8000">// 2<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
    </P
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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.strcspn.html"
><B
CLASS="function"
>strcspn()</B
></A
>.
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