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php 把全角字符转换成半角

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Release: 2016-06-06 20:08:12
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经常遇到用户把英文字符或者标点符号写成了全角,有时候会导致系统无法识别,所以应该先把全角的字符全部转换成正常的半角,减少问题存在。其实原理很简单,也很笨吧,就是把所有的全角字符替换成对应的半角字符,摘自ecshop开源代码里面。 /** * 将一个字串

经常遇到用户把英文字符或者标点符号写成了全角,有时候会导致系统无法识别,所以应该先把全角的字符全部转换成正常的半角,减少问题存在。其实原理很简单,也很笨吧,就是把所有的全角字符替换成对应的半角字符,摘自ecshop开源代码里面。

/**
 *  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);
}
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