So, as much as possible I try to escape all Code Points above U+007F (value 127 in decimal), leaving me with a highly transportable / mostly risk-free document. As this is a language change, a 2/3 majority would be required. The strange thing is that it is possible to specify that a string is to be encoded in Unicode UTF8, but it is not possible to actually use any non-latin character inside that string. background. The following two lines of code actually have slightly different output, but you couldn't tell by looking at them: Double-quoted strings and heredocs that contained sequences beginning with This is proposed for the next major version of PHP, which would be PHP 7 at the time of writing. Thanks for contributing an answer to Stack Overflow! Stack Overflow works best with JavaScript enabled For example, say you wish to output the UTF-8 encoded Unicode codepoint U+202E RIGHT-TO-LEFT OVERRIDE in order to display text right-to-left. something like The Overflow Blog

No string-to-array function exists because it is not needed. This is the value which is being sent to json_escape. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under Definition and Usage. For example, say you wish to output the UTF-8 encoded Unicode codepoint
3. With this you are telling json that it should put an apostrophe there, but it needs the backslash and the u to know that a unicode hexadecimal character code is next.the first backslash is actually escaping the backslash before the apostrophe. You could embed it in source code directly, but it is an invisible character and would display the rest of the line of code (or indeed entire program) in reverse!The solution is to add a Unicode codepoint escape sequence syntax to string literals. Load a string, slash-escape a string. Ruby supports this syntax also, however it allows for multiple codepoints, e.g.

However, Unicode has supported codepoints beyond 16 bits (and hence outside the BMP) since UTF-16 in 1996, 18 years ago, and many useful characters are outside of the BMP, so it would be unreasonable to restrict programmers to only using BMP codepoints. The original hexadecimal escape sequence, \xhh, matches a two-byte UTF-8 character if the value is greater than 127. In JSON backslash is an escape character, so that needs to be escaped, i.e. Created for developers by developers from team Browserling.
We could instead require six hexadecimal digits (which covers the entirety of Unicode), but this would cause bugs, as programmers used to other languages would only expect four to be supported, and expect :-/If I understand correctly, you just want to know why you need to useYou're escaping the slash and the character unicode value. A new escape sequence is added for double-quoted strings and heredocs, with the following syntax: If you are unable to type the emoji for Despite the wide and increasing adoption of Unicode (and UTF-8 in particular) in PHP applications, PHP does not yet have a Unicode codepoint escape syntax in string literals, unlike many other languages. v0.1.1 - Added Future Scope note on named literals Featured on Meta Of course the browser will convert the unicode to UTF8 for you as part of the submit (I use IE5 or better for this) then all you have to do in the PHP is encode the UTF8 so the browser will show it in its raw form. For example, the input string literal "Eat, drink, 愛" should be escaped as "Eat, drink, \u611b". A working pull request containing a patch with tests, is here: In fact, you And the world would be a lot safer without nuclear weapons, but that doesn't mean there aren't any.

"this is the double quote (\") character" \u005c: allow to enter a \ character in a character or string literal, e.g. What is an escape character? Usage. The utf8_encode() function encodes an ISO-8859-1 string to UTF-8. It is commonly used in character and string literals when you need to represent a … Alain Williams suggested on the mailing list that we could add a named literal syntax (i.e. For convenience, you can easily navigate to this page using the following short URL: As others have pointed out, that includes '\' so any backslash run through json_encode will be doubled. In UTF-8 mode, "\x{...}" is allowed, where the contents of the braces is a string of hexadecimal digits. Unicode Escapes” section of the “Chapter 3. And I'm currently doing this in PHP versions older than 5.3.0:In JSON backslash is an escape character, so that needs to be escaped, i.e.Also single and double quotes can cause problems. For example, say you wish to output the UTF-8 encoded Unicode codepoint It would not be a stretch for a programmer to expect the octal escape sequence So converting them to their unicode equivalent in one way to avoid problems.

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