<?<span>php
</span><span>/*</span><span>*
* 汉字拼音首字母工具类
* 注： 英文的字串：不变返回(包括数字) eg .abc123 => abc123
* 中文字符串：返回拼音首字符 eg. 测试字符串 => CSZFC
* 中英混合串: 返回拼音首字符和英文 eg. 我i我j => WIWJ
* eg.
* $py = new str2PY();
*
* $result = $py->getInitials('周杰伦');
*
* //获取首字母
* $result = $py->getFirstString('abc'); //A
* $resutl = $py->getFirstString("周杰伦"); //Z
*
</span><span>*/</span>
<span>class</span><span> str2py
{
</span><span>private</span> <span>$_pinyins</span> = <span>array</span><span>(
</span>176161 => 'A',
176197 => 'B',
178193 => 'C',
180238 => 'D',
182234 => 'E',
183162 => 'F',
184193 => 'G',
185254 => 'H',
187247 => 'J',
191166 => 'K',
192172 => 'L',
194232 => 'M',
196195 => 'N',
197182 => 'O',
197190 => 'P',
198218 => 'Q',
200187 => 'R',
200246 => 'S',
203250 => 'T',
205218 => 'W',
206244 => 'X',
209185 => 'Y',
212209 => 'Z',<span>
);
</span><span>private</span> <span>$_charset</span> = <span>null</span><span>;
</span><span>/*</span><span>*
* 构造函数, 指定需要的编码 default: utf-8
* 支持utf-8, gb2312
*
* @param unknown_type $charset
</span><span>*/</span>
<span>public</span> <span>function</span> __construct(<span>$charset</span> = 'utf-8'<span>)
{
</span><span>$this</span>->_charset = <span>$charset</span><span>;
}
</span><span>/*</span><span>*
* 中文字符串 substr
*
* @param string $str
* @param int $start
* @param int $len
* @return string
</span><span>*/</span>
<span>private</span> <span>function</span> _msubstr(<span>$str</span>, <span>$start</span>, <span>$len</span><span>)
{
</span><span>$start</span> = <span>$start</span> * 2<span>;
</span><span>$len</span> = <span>$len</span> * 2<span>;
</span><span>$strlen</span> = <span>strlen</span>(<span>$str</span><span>);
</span><span>$result</span> = ''<span>;
</span><span>for</span> (<span>$i</span> = 0; <span>$i</span> < <span>$strlen</span>; <span>$i</span>++<span>)
{
</span><span>if</span> (<span>$i</span> >= <span>$start</span> && <span>$i</span> < (<span>$start</span> + <span>$len</span><span>))
{
</span><span>if</span> (<span>ord</span>(<span>substr</span>(<span>$str</span>, <span>$i</span>, 1)) > 129<span>)
{
</span><span>$result</span> .= <span>substr</span>(<span>$str</span>, <span>$i</span>, 2<span>);
}
</span><span>else</span><span>
{
</span><span>$result</span> .= <span>substr</span>(<span>$str</span>, <span>$i</span>, 1<span>);
}
}
</span><span>if</span> (<span>ord</span>(<span>substr</span>(<span>$str</span>, <span>$i</span>, 1)) > 129<span>)
{
</span><span>$i</span>++<span>;
}
}
</span><span>return</span> <span>$result</span><span>;
}
</span><span>/*</span><span>*
* 字符串切分为数组 (汉字或者一个字符为单位)
*
* @param string $str
* @return array
</span><span>*/</span>
<span>private</span> <span>function</span> _cutWord(<span>$str</span><span>)
{
</span><span>$words</span> = <span>array</span><span>();
</span><span>while</span> (<span>$str</span> != ""<span>)
{
</span><span>if</span> (<span>$this</span>->_isAscii(<span>$str</span><span>))
{</span><span>/*</span><span> 非中文 </span><span>*/</span>
<span>$words</span>[] = <span>$str</span>[0<span>];
</span><span>$str</span> = <span>substr</span>(<span>$str</span>, <span>strlen</span>(<span>$str</span>[0<span>]));
}
</span><span>else</span><span>
{
</span><span>$word</span> = <span>$this</span>->_msubstr(<span>$str</span>, 0, 1<span>);
</span><span>$words</span>[] = <span>$word</span><span>;
</span><span>$str</span> = <span>substr</span>(<span>$str</span>, <span>strlen</span>(<span>$word</span><span>));
}
}
</span><span>return</span> <span>$words</span><span>;
}
</span><span>/*</span><span>*
* 判断字符是否是ascii字符
*
* @param string $char
* @return bool
</span><span>*/</span>
<span>private</span> <span>function</span> _isAscii(<span>$char</span><span>)
{
</span><span>return</span> ( <span>ord</span>(<span>substr</span>(<span>$char</span>, 0, 1)) < 160<span> );
}
</span><span>/*</span><span>*
* 判断字符串前3个字符是否是ascii字符
*
* @param string $str
* @return bool
</span><span>*/</span>
<span>private</span> <span>function</span> _isAsciis(<span>$str</span><span>)
{
</span><span>$len</span> = <span>strlen</span>(<span>$str</span>) >= 3 ? 3 : 2<span>;
</span><span>$chars</span> = <span>array</span><span>();
</span><span>for</span> (<span>$i</span> = 1; <span>$i</span> < <span>$len</span> - 1; <span>$i</span>++<span>)
{
</span><span>$chars</span>[] = <span>$this</span>->_isAscii(<span>$str</span>[<span>$i</span>]) ? 'yes' : 'no'<span>;
}
</span><span>$result</span> = <span>array_count_values</span>(<span>$chars</span><span>);
</span><span>if</span> (<span>empty</span>(<span>$result</span>['no'<span>]))
{
</span><span>return</span> <span>true</span><span>;
}
</span><span>return</span> <span>false</span><span>;
}
</span><span>/*</span><span>*
* 获取中文字串的拼音首字符
*
* @param string $str
* @return string
</span><span>*/</span>
<span>public</span> <span>function</span> getInitials(<span>$str</span><span>)
{
</span><span>if</span> (<span>empty</span>(<span>$str</span><span>))
</span><span>return</span> ''<span>;
</span><span>if</span> (<span>$this</span>->_isAscii(<span>$str</span>[0]) && <span>$this</span>->_isAsciis(<span>$str</span><span>))
{
</span><span>return</span> <span>$str</span><span>;
}
</span><span>$result</span> = <span>array</span><span>();
</span><span>if</span> (<span>$this</span>->_charset == 'utf-8'<span>)
{
</span><span>$str</span> = <span>iconv</span>('utf-8', 'gb2312', <span>$str</span><span>);
}
</span><span>$words</span> = <span>$this</span>->_cutWord(<span>$str</span><span>);
</span><span>foreach</span> (<span>$words</span> <span>as</span> <span>$word</span><span>)
{
</span><span>if</span> (<span>$this</span>->_isAscii(<span>$word</span><span>))
{</span><span>/*</span><span> 非中文 </span><span>*/</span>
<span>$result</span>[] = <span>$word</span><span>;
</span><span>continue</span><span>;
}
</span><span>$code</span> = <span>ord</span>(<span>substr</span>(<span>$word</span>, 0, 1)) * 1000 + <span>ord</span>(<span>substr</span>(<span>$word</span>, 1, 1<span>));
</span><span>/*</span><span> 获取拼音首字母A--Z </span><span>*/</span>
<span>if</span> ((<span>$i</span> = <span>$this</span>->_search(<span>$code</span>)) != -1<span>)
{
</span><span>$result</span>[] = <span>$this</span>->_pinyins[<span>$i</span><span>];
}
}
</span><span>return</span> <span>strtoupper</span>(<span>implode</span>('', <span>$result</span><span>));
}
</span><span>/*</span><span>*
* 20140624 wangtianbao 获取首字母
* @param string $str
* @return string
</span><span>*/</span>
<span>public</span> <span>function</span> getFirstString(<span>$str</span><span>)
{
</span><span>//</span><span>先把中文转换成字母</span>
<span>$new_string</span> = <span>$this</span>->getInitials(<span>$str</span><span>);
</span><span>if</span> (<span>empty</span>(<span>$new_string</span><span>))
{
</span><span>return</span> ''<span>;
}
</span><span>else</span><span>
{
</span><span>return</span> <span>strtoupper</span>(<span>substr</span>(<span>$new_string</span>, 0, 1<span>));
}
}
</span><span>private</span> <span>function</span> _getChar(<span>$ascii</span><span>)
{
</span><span>if</span> (<span>$ascii</span> >= 48 && <span>$ascii</span> <= 57<span>)
{
</span><span>return</span> <span>chr</span>(<span>$ascii</span>); <span>/*</span><span> 数字 </span><span>*/</span><span>
}
</span><span>elseif</span> (<span>$ascii</span> >= 65 && <span>$ascii</span> <= 90<span>)
{
</span><span>return</span> <span>chr</span>(<span>$ascii</span>); <span>/*</span><span> A--Z </span><span>*/</span><span>
}
</span><span>elseif</span> (<span>$ascii</span> >= 97 && <span>$ascii</span> <= 122<span>)
{
</span><span>return</span> <span>chr</span>(<span>$ascii</span> - 32); <span>/*</span><span> a--z </span><span>*/</span><span>
}
</span><span>else</span><span>
{
</span><span>return</span> '-'; <span>/*</span><span> 其他 </span><span>*/</span><span>
}
}
</span><span>/*</span><span>*
* 查找需要的汉字内码(gb2312) 对应的拼音字符( 二分法 )
*
* @param int $code
* @return int
</span><span>*/</span>
<span>private</span> <span>function</span> _search(<span>$code</span><span>)
{
</span><span>$data</span> = <span>array_keys</span>(<span>$this</span>-><span>_pinyins);
</span><span>$lower</span> = 0<span>;
</span><span>$upper</span> = <span>sizeof</span>(<span>$data</span>) - 1<span>;
</span><span>$middle</span> = (int) <span>round</span>((<span>$lower</span> + <span>$upper</span>) / 2<span>);
</span><span>if</span> (<span>$code</span> < <span>$data</span>[0<span>])
</span><span>return</span> -1<span>;
</span><span>for</span><span> (;;)
{
</span><span>if</span> (<span>$lower</span> > <span>$upper</span><span>)
{
</span><span>return</span> <span>$data</span>[<span>$lower</span> - 1<span>];
}
</span><span>$tmp</span> = (int) <span>round</span>((<span>$lower</span> + <span>$upper</span>) / 2<span>);
</span><span>if</span> (!<span>isset</span>(<span>$data</span>[<span>$tmp</span><span>]))
{
</span><span>return</span> <span>$data</span>[<span>$middle</span><span>];
}
</span><span>else</span><span>
{
</span><span>$middle</span> = <span>$tmp</span><span>;
}
</span><span>if</span> (<span>$data</span>[<span>$middle</span>] < <span>$code</span><span>)
{
</span><span>$lower</span> = (int) <span>$middle</span> + 1<span>;
}
</span><span>else</span> <span>if</span> (<span>$data</span>[<span>$middle</span>] == <span>$code</span><span>)
{
</span><span>return</span> <span>$data</span>[<span>$middle</span><span>];
}
</span><span>else</span><span>
{
</span><span>$upper</span> = (int) <span>$middle</span> - 1<span>;
}
}
}
}</span>
以上就介绍了php-汉字拼音首字母工具类，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
