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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?
1 <?php
2 // 说明:PHP 中将全角字符转换成半角的方法 3 // 整理:http://www.CodeBit.cn 4 5 /*全角=>半角*/ 6 function SBC_DBC($Str) { 7 $Queue = Array( 8 '0' => '0', '1' => '1', '2' => '2', '3' => '3', '4' => '4', 9 '5' => '5', '6' => '6', '7' => '7', '8' => '8', '9' => '9', 10 'A' => 'A', 'B' => 'B', 'C' => 'C', 'D' => 'D', 'E' => 'E', 11 'F' => 'F', 'G' => 'G', 'H' => 'H', 'I' => 'I', 'J' => 'J', 12 'K' => 'K', 'L' => 'L', 'M' => 'M', 'N' => 'N', 'O' => 'O', 13 'P' => 'P', 'Q' => 'Q', 'R' => 'R', 'S' => 'S', 'T' => 'T', 14 'U' => 'U', 'V' => 'V', 'W' => 'W', 'X' => 'X', 'Y' => 'Y', 15 'Z' => 'Z', 'a' => 'a', 'b' => 'b', 'c' => 'c', 'd' => 'd', 16 'e' => 'e', 'f' => 'f', 'g' => 'g', 'h' => 'h', 'i' => 'i', 17 'j' => 'j', 'k' => 'k', 'l' => 'l', 'm' => 'm', 'n' => 'n', 18 'o' => 'o', 'p' => 'p', 'q' => 'q', 'r' => 'r', 's' => 's', 19 't' => 't', 'u' => 'u', 'v' => 'v', 'w' => 'w', 'x' => 'x', 20 'y' => 'y', 'z' => 'z', '-' => '-' 21 ); 22 23 return preg_replace("/([\xA3][\xB0-\xB9\xC1-\xDA\xE1-\xFA])/e", "\$Queue[\\1]", $Str); 24 } 25 26 $str = "Codebit.cn - 聚合小段精华代码"; 27 28 echo $str; 29 echo "<br />"; 30 echo SBC_DBC($str); 31 ?> |
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