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<div class="codetitle"><a style="CURSOR: pointer" data="35947" class="copybut" id="copybut35947" onclick="doCopy('code35947')"> 代码如下:<div class="codebody" id="code35947">
/*
将一个字串中含有全角的数字字符、字母、空格或'%+-()'字符转换为相应半角字符
@access public
@param string $str 待转换字串
@return string $str 处理后字串
/
function make_semiangle($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);
}
<div class="codetitle"><a style="CURSOR: pointer" data="27661" class="copybut" id="copybut27661" onclick="doCopy('code27661')"> 代码如下:<div class="codebody" id="code27661">
<?php
$str = "０１２３ＡＢＣＤＦＷＳ＼＂，．？＜＞｛｝［］＊＆＾％＃＠！～（）＋－｜：；";
echo "$str";
echo "
";
$str = preg_replace('/xa3([xa1-xfe])/e','chr(ord(1)-0x80)',$str);
echo $str;
?>
另外为大家分享一个函数
在许多收集用户信息的表单里，期望用户输入的是半角字符，但是无论你如何强调，如何提醒，还是会有粗心的用户提交全角数据，其实，在一些新手眼中，全角和半角根本就没有区别，甚至他们会觉得：我提交的明明是正确的信息，为什么会提示错误呢？实际上，全角和半角有一一对应关系，而大多数用户并非故意输入错误的信息，所以，我们可以通过程序来避免这种情况的发生，最多，可以在转换后给用户一个确认的机会，这样，或许能够给用户一个更好的体验。下面介绍一个函数，实现字符 半角 和 全角 之间的互转。
代码如下:header("Content-type: text/html; charset=utf-8");
// 第一个参数：传入要转换的字符串
// 第二个参数：取0，半角转全角；取1，全角到半角
function SBC_DBC($str,$args2) {
$DBC = Array(
'０','１','２','３','４',
'５','６','７','８','９',
'Ａ','Ｂ','Ｃ','Ｄ','Ｅ',
'Ｆ','Ｇ','Ｈ','Ｉ','Ｊ',
'Ｋ','Ｌ','Ｍ','Ｎ','Ｏ',
'Ｐ','Ｑ','Ｒ','Ｓ','Ｔ',
'Ｕ','Ｖ','Ｗ','Ｘ','Ｙ',
'Ｚ','ａ','ｂ','ｃ','ｄ',
'ｅ','ｆ','ｇ','ｈ','ｉ',
'ｊ','ｋ','ｌ','ｍ','ｎ',
'ｏ','ｐ','ｑ','ｒ','ｓ',
'ｔ','ｕ','ｖ','ｗ','ｘ',
'ｙ','ｚ','－',' ','：',
'．','，','／','％','＃',
'！','＠','＆','（','）',
'＜','＞','＂','＇','？',
'［','］','｛','｝','＼',
'｜','＋','＝','＿','＾',
'￥','￣','｀'
);
$SBC = Array( // 半角
'0','1','2','3','4',
'5','6','7','8','9',
'A','B','C','D','E',
'F','G','H','I','J',
'K','L','M','N','O',
'P','Q','R','S','T',
'U','V','W','X','Y',
'Z','a','b','c','d',
'e','f','g','h','i',
'j','k','l','m','n',
'o','p','q','r','s',
't','u','v','w','x',
'y','z','-',' ',':',
'.','/','%','#',
'!','@','&','(',')',
'<','>','"',''','?',
'[',']','{','}','',
'|','+','=','_','^',
'$','~','`'
);
if ($args2 == 0) {
return str_replace($SBC,$DBC,$str); // 半角到全角
} else if ($args2 == 1) {
return str_replace($DBC,$SBC,$str); // 全角到半角
} else {
return false;
}
}
$str1 = "//www.jb51.cc/ - 脚本之家";
$str2 = "ｈｔｔｐ：／／ＪＢ５１．ｎｅｔ／ － 脚本之家";
echo "半角 转 全角：
";
echo $str1 . ' -> ' . SBC_DBC($str1,0);
echo "
全角 转 半角：
";
echo $str2 . ' -> ' . SBC_DBC($str2,1);
?>
（编辑：安卓应用网）
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