php中escape和unescape
2014-04-13 14:19
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最近开发项目的要和delphi进行通信,其中涉及到了中文的传输导致中文为为乱码无法解析
经过本人测试,在文件格式为gbk和utf-8编码时,php在对字符进行escape的过程也是不一样的
在gbk下面：
[php] view
plaincopy
<?php
$str = "我是来测试的";
$enStr = escape ( $str );
echo $enStr . "<br/>";
echo '解:'.unescape( $enStr )."<br/>";
echo unescape('%u6211%u662F%u6765%u6D4B%u8BD5%u7684');
function escape($str) {
$sublen = strlen ( $str );
$retrunString = "";
for($i = 0; $i < $sublen; $i ++) {
if (ord ( $str [$i] ) >= 127) {
$tmpString = bin2hex ( iconv ( "gb2312", "ucs-2", substr ( $str, $i, 2 ) ) );
$retrunString .= "%u" . $tmpString;
$i ++;
} else {
$retrunString .= "%" . dechex ( ord ( $str [$i] ) );
}
}
return $retrunString;
}
function unescape($str) {
$str = rawurldecode ( $str );
preg_match_all ( "/%u.{4}|&#x.{4};|&#\d+;|.+/U", $str, $r );
$ar = $r [0];
foreach ( $ar as $k => $v ) {
if (substr ( $v, 0, 2 ) == "%u")
$ar [$k] = iconv ( "UCS-2", "GBK", pack ( "H4", substr ( $v, - 4 ) ) );
elseif (substr ( $v, 0, 3 ) == "&#x")
$ar [$k] = iconv ( "UCS-2", "GBK", pack ( "H4", substr ( $v, 3, - 1 ) ) );
elseif (substr ( $v, 0, 2 ) == "&#") {
$ar [$k] = iconv ( "UCS-2", "GBK", pack ( "n", substr ( $v, 2, - 1 ) ) );
}
}
return join ( "", $ar );
}
?>
<html>
<head>
<script type="text/javascript">
var str = '我是来测试的';
var enStr = escape(str);
alert(enStr+"解:"+unescape(enStr));
</script>
</head>
</html>
在utf-8下面:
[php] view
plaincopy
<?php
$str = "我是来测试的";
$enStr = escape ( $str );
echo $enStr . "<br/>";
echo '解:'.unescape( $enStr )."<br/>";
echo unescape('%u6211%u662F%u6765%u6D4B%u8BD5%u7684');
function escape($str) {
preg_match_all ( "/[\xc2-\xdf][\x80-\xbf]+|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}|[\x01-\x7f]+/e", $str, $r );
//匹配utf-8字符，
$str = $r [0];
$l = count ( $str );
for($i = 0; $i < $l; $i ++) {
$value = ord ( $str [$i] [0] );
if ($value < 223) {
$str [$i] = rawurlencode ( utf8_decode ( $str [$i] ) );
//先将utf8编码转换为ISO-8859-1编码的单字节字符，urlencode单字节字符.
//utf8_decode()的作用相当于iconv("UTF-8","CP1252",$v)。
} else {
$str [$i] = "%u" . strtoupper ( bin2hex ( iconv ( "UTF-8", "UCS-2", $str [$i] ) ) );
}
}
return join ( "", $str );
}
function unescape($str) {
$ret = '';
$len = strlen ( $str );
for($i = 0; $i < $len; $i ++) {
if ($str [$i] == '%' && $str [$i + 1] == 'u') {
$val = hexdec ( substr ( $str, $i + 2, 4 ) );
if ($val < 0x7f)
$ret .= chr ( $val );
else if ($val < 0x800)
$ret .= chr ( 0xc0 | ($val >> 6) ) . chr ( 0x80 | ($val & 0x3f) );
else
$ret .= chr ( 0xe0 | ($val >> 12) ) . chr ( 0x80 | (($val >> 6) & 0x3f) ) . chr ( 0x80 | ($val & 0x3f) );
$i += 5;
} else if ($str [$i] == '%') {
$ret .= urldecode ( substr ( $str, $i, 3 ) );
$i += 2;
} else
$ret .= $str [$i];
}
return $ret;
}
?>
<html>
<head>
<script type="text/javascript">
var str = '我是来测试的';
var enStr = escape(str);
alert(enStr+"解:"+unescape(enStr));
</script>
</head>
</html>
经过本人测试,在文件格式为gbk和utf-8编码时,php在对字符进行escape的过程也是不一样的
在gbk下面：
[php] view
plaincopy
<?php
$str = "我是来测试的";
$enStr = escape ( $str );
echo $enStr . "<br/>";
echo '解:'.unescape( $enStr )."<br/>";
echo unescape('%u6211%u662F%u6765%u6D4B%u8BD5%u7684');
function escape($str) {
$sublen = strlen ( $str );
$retrunString = "";
for($i = 0; $i < $sublen; $i ++) {
if (ord ( $str [$i] ) >= 127) {
$tmpString = bin2hex ( iconv ( "gb2312", "ucs-2", substr ( $str, $i, 2 ) ) );
$retrunString .= "%u" . $tmpString;
$i ++;
} else {
$retrunString .= "%" . dechex ( ord ( $str [$i] ) );
}
}
return $retrunString;
}
function unescape($str) {
$str = rawurldecode ( $str );
preg_match_all ( "/%u.{4}|&#x.{4};|&#\d+;|.+/U", $str, $r );
$ar = $r [0];
foreach ( $ar as $k => $v ) {
if (substr ( $v, 0, 2 ) == "%u")
$ar [$k] = iconv ( "UCS-2", "GBK", pack ( "H4", substr ( $v, - 4 ) ) );
elseif (substr ( $v, 0, 3 ) == "&#x")
$ar [$k] = iconv ( "UCS-2", "GBK", pack ( "H4", substr ( $v, 3, - 1 ) ) );
elseif (substr ( $v, 0, 2 ) == "&#") {
$ar [$k] = iconv ( "UCS-2", "GBK", pack ( "n", substr ( $v, 2, - 1 ) ) );
}
}
return join ( "", $ar );
}
?>
<html>
<head>
<script type="text/javascript">
var str = '我是来测试的';
var enStr = escape(str);
alert(enStr+"解:"+unescape(enStr));
</script>
</head>
</html>
在utf-8下面:
[php] view
plaincopy
<?php
$str = "我是来测试的";
$enStr = escape ( $str );
echo $enStr . "<br/>";
echo '解:'.unescape( $enStr )."<br/>";
echo unescape('%u6211%u662F%u6765%u6D4B%u8BD5%u7684');
function escape($str) {
preg_match_all ( "/[\xc2-\xdf][\x80-\xbf]+|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}|[\x01-\x7f]+/e", $str, $r );
//匹配utf-8字符，
$str = $r [0];
$l = count ( $str );
for($i = 0; $i < $l; $i ++) {
$value = ord ( $str [$i] [0] );
if ($value < 223) {
$str [$i] = rawurlencode ( utf8_decode ( $str [$i] ) );
//先将utf8编码转换为ISO-8859-1编码的单字节字符，urlencode单字节字符.
//utf8_decode()的作用相当于iconv("UTF-8","CP1252",$v)。
} else {
$str [$i] = "%u" . strtoupper ( bin2hex ( iconv ( "UTF-8", "UCS-2", $str [$i] ) ) );
}
}
return join ( "", $str );
}
function unescape($str) {
$ret = '';
$len = strlen ( $str );
for($i = 0; $i < $len; $i ++) {
if ($str [$i] == '%' && $str [$i + 1] == 'u') {
$val = hexdec ( substr ( $str, $i + 2, 4 ) );
if ($val < 0x7f)
$ret .= chr ( $val );
else if ($val < 0x800)
$ret .= chr ( 0xc0 | ($val >> 6) ) . chr ( 0x80 | ($val & 0x3f) );
else
$ret .= chr ( 0xe0 | ($val >> 12) ) . chr ( 0x80 | (($val >> 6) & 0x3f) ) . chr ( 0x80 | ($val & 0x3f) );
$i += 5;
} else if ($str [$i] == '%') {
$ret .= urldecode ( substr ( $str, $i, 3 ) );
$i += 2;
} else
$ret .= $str [$i];
}
return $ret;
}
?>
<html>
<head>
<script type="text/javascript">
var str = '我是来测试的';
var enStr = escape(str);
alert(enStr+"解:"+unescape(enStr));
</script>
</head>
</html>
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