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本函数摘录自 BugFree，支持字母和gb2312或者utf-8混和字符串。
1 <?php
2 // 说明：摘录自 BugFree 的字符截取函数 3 // 整理：labs.cnblogs.com 4 5 /** 6 * @package BugFree 7 * @version $Id: FunctionsMain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss Exp $ 8 * 9 * 10 * Return part of a string(Enhance the function substr()) 11 * 12 * @author Chunsheng Wang <[email protected]> 13 * @param string $String the string to cut. 14 * @param int $Length the length of returned string. 15 * @param booble $Append whether append "": false|true 16 * @return string the cutted string. 17 */ 18 function sysSubStr($String,$Length,$Append = false) 19 { 20 if (strlen($String) <= $Length ) 21 { 22 return $String; 23 } 24 else 25 { 26 $I = 0; 27 while ($I < $Length) 28 { 29 $StringTMP = substr($String,$I,1); 30 if ( ord($StringTMP) >=224 ) 31 { 32 $StringTMP = substr($String,$I,3); 33 $I = $I + 3; 34 } 35 elseif( ord($StringTMP) >=192 ) 36 { 37 $StringTMP = substr($String,$I,2); 38 $I = $I + 2; 39 } 40 else 41 { 42 $I = $I + 1; 43 } 44 $StringLast[] = $StringTMP; 45 } 46 $StringLast = implode("",$StringLast); 47 if($Append) 48 { 49 $StringLast .= ""; 50 } 51 return $StringLast; 52 } 53 } 54 55 $String = "CodeBit.cn -- 简单、精彩、通用"; 56 $Length = "18"; 57 $Append = false; 58 echo sysSubStr($String,$Length,$Append); 59 ?> |
2022-11-06
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