php全角转半角方法
<p>在过滤或者其他一些应用找,文字里面包含全角，需要将他转成半角，有各种各样的方法,这边使用了php的strtr函数。好了。直接上代码：</p><p> </p>
<p><strong>全角转半角</strong></p><pre class="brush:bash;toolbar:false">/**
* 全角转半角
* 运维生存时间
* site:www.ttlsa.com
* @param 传入的字符串 $str
* @return string
*/
function full2semiangle($str)
{
$arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3',
'４' => '4',
'５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9',
'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E',
'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J',
'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O',
'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T',
'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y',
'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd',
'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i',
'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n',
'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's',
'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x',
'ｙ' => 'y', 'ｚ' => 'z','（' => '(', '）' => ')',
'〔' => '[', '〕' => ']', '【' => '[','】' => ']',
'〖' => '[', '〗' => ']', '“' => '[', '”' => ']','‘' => '[',
'’' => ']','｛' => '{', '｝' => '}', '《' => '<','》' => '>',
'％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-',
'：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.',
'；' => ',', '？' => '?', '！' => '!', '…' => '-', '‖' => '|',
'”' => '"', '’' => '`', '‘' => '`', '｜' => '|', '〃' => '"',
' ' => ' ','＄'=>'$','＠'=>'@','＃'=>'#','＾'=>'^','＆'=>'&',
'＊'=>'*', '＂'=>'"');
return strtr($str, $arr);
}</pre><p>$str：要转的字符串<br>
$arr：全半角映射关系</p>
<p><strong>半角转全角</strong><br>
将数组总的顺序替换一下即可</p>
<p>这个方法可以用在各种地方,在上面的数组里面你可以添加'二'=>'2'，这样一来字符串中的"二"将会被替换成阿拉伯数字"2".</p>
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