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>ctype_lower</H1
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><P
> (PHP 4 >= 4.0.4, PHP 5)</P
>ctype_lower -- Check for lowercase character(s)</DIV
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><H2
>说明</H2
>bool <B
CLASS="methodname"
>ctype_lower</B
> ( string text )<BR
></BR
><P
> Checks if all of the characters in the provided string,
<CODE
CLASS="parameter"
>text</CODE
>, are lowercase letters.
</P
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><H2
>参数</H2
><P
> <P
></P
><DIV
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><DL
><DT
><CODE
CLASS="parameter"
>text</CODE
></DT
><DD
><P
> The tested string.
</P
></DD
></DL
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>
</P
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><H2
>返回值</H2
><P
> Returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if every character in <CODE
CLASS="parameter"
>text</CODE
> is
a lowercase letter in the current locale.
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>范例</H2
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><P
><B
>例 1. A <B
CLASS="function"
>ctype_lower()</B
> example (using the default locale)</B
></P
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><code><font color="#000000">
<font color="#0000BB"><?php<br />$strings </font><font color="#007700">= array(</font><font color="#DD0000">'aac123'</font><font color="#007700">, </font><font color="#DD0000">'qiutoas'</font><font color="#007700">, </font><font color="#DD0000">'QASsdks'</font><font color="#007700">);<br />foreach (</font><font color="#0000BB">$strings </font><font color="#007700">as </font><font color="#0000BB">$testcase</font><font color="#007700">) {<br /> if (</font><font color="#0000BB">ctype_lower</font><font color="#007700">(</font><font color="#0000BB">$testcase</font><font color="#007700">)) {<br /> echo </font><font color="#DD0000">"The string $testcase consists of all lowercase letters.</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /> } else {<br /> echo </font><font color="#DD0000">"The string $testcase does not consist of all lowercase letters.</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /> }<br />}<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
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><P
>上例将输出：</P
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><PRE
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>The string aac123 does not consist of all lowercase letters.
The string qiutoas consists of all lowercase letters.
The string QASsdks does not consist of all lowercase letters.</PRE
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>
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>参见</H2
><P
> <P
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><A
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><B
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>ctype_alpha()</B
></A
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><A
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><B
CLASS="function"
>ctype_upper()</B
></A
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>setlocale()</B
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