PHP decrypts Unicode and Escape encrypted strings

PHP decrypts Unicode and Escape encrypted strings

Json does not support Chinese characters. If you use json to transmit Chinese data, data loss or garbled characters may occur. The strings to be sent must be encoded before transmission, in the past, JavaScript was used for data parsing. Considering that there is a scape function in js, if there is an escape Function in php, the data will be encoded and decoded on the client using unescape, this will be much more convenient.

This article will share with you a PHP function used to decrypt Unicode and Escape encrypted strings.

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<? Php Function uni_decode ($ s ){ Preg_match_all ('/\ # ([0-9] {}) \;/', $ s, $ html_uni ); Preg_match_all ('/[\\\%] u ([0-9a-f] {4})/ie', $ s, $ js_uni ); $ Source = array_merge ($ html_uni [0], $ js_uni [0]); $ Js = array (); For ($ I = 0; $ I <count ($ js_uni [1]); $ I ++ ){ $ Js [] = hexdec ($ js_uni [1] [$ I]); } $ Utf8 = array_merge ($ html_uni [1], $ js ); $ Code = $ s; For ($ j = 0; $ j <count ($ utf8); $ j ++ ){ $ Code = str_replace ($ source [$ j], unicode2utf8 ($ utf8 [$ j]), $ code ); } Return $ code; // $ s; // preg_replace ('// \\\ u ([0-9a-f] {4})/ie ', "chr (hexdec ('\ 1')", $ s ); }   Function unicode2utf8 ($ c ){ $ Str = ""; If ($ c <0x80 ){ $ Str. = chr ($ c ); } Else if ($ c <0x800 ){ $ Str. = chr (0xc0 | $ c> 6 ); $ Str. = chr (0x80 | $ c & 0x3f ); } Else if ($ c <0x10000 ){ $ Str. = chr (0xe0 | $ c> 12 ); $ Str. = chr (0x80 | $ c> 6 & 0x3f ); $ Str. = chr (0x80 | $ c & 0x3f ); } Else if ($ c <0x200000 ){ $ Str. = chr (0xf0 | $ c> 18 ); $ Str. = chr (0x80 | $ c> 12 & 0x3f ); $ Str. = chr (0x80 | $ c> 6 & 0x3f ); $ Str. = chr (0x80 | $ c & 0x3f ); } Return $ str; }   $ Str = '% u5927 % u5BB6 % u597D % uFF0C I am a lone soul! <Br/> \ u8FD9 \ u662F \ u6D4B \ u8BD5 \ u6587 \ u672C \ uFF01 '; Echo uni_decode ($ str); // Hello, everyone! This is the test text!

Search for one on the Internet. Many escape functions implemented using php are similar.

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Function phpescape ($ str ){ Preg_match_all ("/[\ x80-\ xff]. | [\ x01-\ x7f] +/", $ str, $ newstr ); $ Ar = $ newstr [0]; Foreach ($ ar as $ k => $ v ){ If (ord ($ ar [$ k]) & gt; = 127 ){ $ TmpString = bin2hex (iconv ("GBK", "ucs-2", $ v )); If (! Eregi ("WIN", PHP_ OS )){ $ TmpString = substr ($ tmpString, 2, 2). substr ($ tmpString, 0, 2 ); } $ ReString. = "% u". $ tmpString; } Else { $ ReString. = rawurlencode ($ v ); } } Return $ reString; }

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