首页 / 网页编程 / PHP / PHP实现Javascript中的escape及unescape函数代码分享

<?phpclasscoding{//模仿JAVASCRIPT的ESCAPE和UNESCAPE函数的功能 functionunescape（$str）{$text=preg_replace_callback（"/%u[0-9A-Za-z]{4}/",array（&$this,"toUtf8"）,$str）;returnmb_convert_encoding（$text,"gb2312","utf-8"）;}functiontoUtf8（$ar）{foreach（$aras$val）{$val=intval（substr（$val,2）,16）;if（$val<0x7F）{// 0000-007F $c.=chr（$val）;}elseif（$val<0x800）{// 0080-0800 $c.=chr（0xC0|（$val/64））;$c.=chr（0x80|（$val%64））;}else{// 0800-FFFF $c.=chr（0xE0|（（$val/64）/64））;$c.=chr（0x80|（（$val/64）%64））;$c.=chr（0x80|（$val%64））;}}return$c;}functionescape（$string,$encoding="gb2312"）{$return="";for（$x=0;$x<mb_strlen（$string,$encoding）;$x++）{$str=mb_substr（$string,$x,1,$encoding）;if（strlen（$str）>1）{// 多字节字符 $return.="%u".strtoupper（bin2hex（mb_convert_encoding（$str,"UCS-2",$encoding）））;}else{$return.="%".strtoupper（bin2hex（$str））;}}return$return;}functiongb2utf8（$string,$encoding="utf-8",$from_encode="gb2312"）{returnmb_convert_encoding（$string,$encoding,$from_encode）;}}?>

<?php functionphpescape（$str）{$sublen=strlen（$str）;$retrunString="";for（$i=0;$i<$sublen;$i++）{if（ord（$str[$i]）>=127）{$tmpString=bin2hex（iconv（"gbk","ucs-2",substr（$str,$i,2）））;$tmpString=substr（$tmpString,2,2）.substr（$tmpString,0,2）;$retrunString.="%u".$tmpString;$i++;}else{$retrunString.="%".dechex（ord（$str[$i]））;}}return$retrunString;}functionescape（$str）{preg_match_all（"/[x80-xff].|[x01-x7f]+/",$str,$r）;$ar=$r[0];foreach（$aras$k=>$v）{if（ord（$v[0]）<128）$ar[$k]=rawurlencode（$v）;else$ar[$k]="%u".bin2hex（iconv（"UTF-8","UCS-2",$v））;}returnjoin（"",$ar）;} functionphpunescape（$source）{$decodedStr="";$pos=0;$len=strlen（$source）;while（$pos<$len）{$charAt=substr（$source,$pos,1）;if（$charAt=="%"）{$pos++;$charAt=substr（$source,$pos,1）;if（$charAt=="u"）{// we got a unicode character $pos++;$unicodeHexVal=substr（$source,$pos,4）;$unicode=hexdec（$unicodeHexVal）;$entity="&#".$unicode.";";$decodedStr.=utf8_encode（$entity）;$pos+=4;}else{// we have an escaped ascii character $hexVal=substr（$source,$pos,2）;$decodedStr.=chr（hexdec（$hexVal））;$pos+=2;}}else{$decodedStr.=$charAt;$pos++;}}return$decodedStr;}functionunescape（$str）{$str=rawurldecode（$str）;preg_match_all（"/（?:%u.{4}）|&#x.{4};|&#d+;|.+/U",$str,$r）;$ar=$r[0];#print_r（$ar）;foreach（$aras$k=>$v）{if（substr（$v,0,2）=="%u"）$ar[$k]=iconv（"UCS-2","UTF-8",pack（"H4",substr（$v,-4）））;elseif（substr（$v,0,3）=="&#x"）$ar[$k]=iconv（"UCS-2","UTF-8",pack（"H4",substr（$v,3,-1）））;elseif（substr（$v,0,2）=="&#"）{//echo substr（$v,2,-1）."";$ar[$k]=iconv（"UCS-2","UTF-8",pack（"n",substr（$v,2,-1）））;}}returnjoin（"",$ar）;} ?>