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php Programming Glossary: x61

Has anyone seen php encryption like this? [closed]

http://stackoverflow.com/questions/12576606/has-anyone-seen-php-encryption-like-this

x68 x6b x62i x6cl x47L x4fB x41 x4cS x70ve x6b x72 x71 x68 x61 x64 x6d x69n x47L x4f x42 x41 x4cS x73 x6b x62 x64 x66 x6dn.. x73 x70 x65 x74 x74 x79 x47 x4c x4f x42 x41L x53 x72 x76r x61 x77q x68 x74i x67 d x61 x74 x65 x47 x4c x4f x42ALS x6d x6e x76.. x47 x4c x4f x42 x41L x53 x72 x76r x61 x77q x68 x74i x67 d x61 x74 x65 x47 x4c x4f x42ALS x6d x6e x76 x6a x72 x6c x78 x70 x73q..

How to hide an iframe url in HTML source code

http://stackoverflow.com/questions/3207337/how-to-hide-an-iframe-url-in-html-source-code

x77 x77 x77 x2E x67 x6F x6F x67 x6C x65 x2E x63 x6F x6D x61 x74 x74 x72 x23 x6D x79 x69 x46 x72 x61 x6D x65 _0xc1cb 3 _0xc1cb.. x2E x63 x6F x6D x61 x74 x74 x72 x23 x6D x79 x69 x46 x72 x61 x6D x65 _0xc1cb 3 _0xc1cb 2 _0xc1cb 0 _0xc1cb 1 share improve..

How does this giant regex work?

http://stackoverflow.com/questions/3328235/how-does-this-giant-regex-work

default_charset Windows 1251 preg_replace . e x65 x76 x61 x6C x28 x67 x7A x69 x6E x66 x6C x61 x74 x65 x28 x62 x61 x73.. . e x65 x76 x61 x6C x28 x67 x7A x69 x6E x66 x6C x61 x74 x65 x28 x62 x61 x73 x65 x36 x34 x5F x64 x65 x63 x6F x64.. x61 x6C x28 x67 x7A x69 x6E x66 x6C x61 x74 x65 x28 x62 x61 x73 x65 x36 x34 x5F x64 x65 x63 x6F x64 x65 x28'7b1tVxs50jD8OXvO9R9Er3fanhhjm2Q2Y7ADIZCQSSAD5GUC3N623bZ7aLs93W0Mk..

Replacing invalid UTF-8 characters by question marks, mbstring.substitute_character seems ignored

http://stackoverflow.com/questions/8215050/replacing-invalid-utf-8-characters-by-question-marks-mbstring-substitute-charac

http www.unicode.org versions Unicode6.1.0 ch03.pdf x61 . xF1 x80 x80 . xE1 x80 . xC2 . x62 . x80 . x63 . x80 . xBF..