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Single quotes, double quotes, backslashes and null characters in all user-supplied data all have a backslash prepended to them before being passed to the script in the $_GET, $_REQUEST, $_POST and $_COOKIE global variables. Developers can then in theory use string concatenation to construct safe SQL queries with data provided by the user.
Enabling the ansi_quotes SQL mode enforces the SQL standard behavior. These can also be used regardless of this mode through backticks: `YEAR`. Clauses, which are constituent components of statements and queries. (In some cases, these are optional.) [1] Expressions, which can produce either scalar values, or tables consisting of columns and ...
The Unicode character ’ (U+2019 RIGHT SINGLE QUOTATION MARK) is used for both a typographic apostrophe and a single right (closing) quotation mark. [1] This is due to the many fonts and character sets (such as CP1252) that unified the characters into a single code point, and the difficulty of software distinguishing which character is intended by a user's typing. [2]
95 characters; the 52 alphabet characters belong to the Latin script. The remaining 43 belong to the common script. The 33 characters classified as ASCII Punctuation & Symbols are also sometimes referred to as ASCII special characters. Often only these characters (and not other Unicode punctuation) are what is meant when an organization says a ...
8-bit character specification where # is a hex digit. The length of a hex escape sequence is not limited to two digits, instead being of an arbitrary length. [4] \ooo: Depends on encoding [b] 8-bit character specification where o is an octal digit [4] \" U+0022: double quote (") [4] \& non-character used to delimit numeric escapes in Haskell [2 ...
ISO/IEC FDIS 8859-1:1998 Archived 2020-09-30 at the Wayback Machine — 8-bit single-byte coded graphic character sets, Part 1: Latin alphabet No. 1 (draft dated February 12, 1998, published April 15, 1998) Standard ECMA-94: 8-Bit Single Byte Coded Graphic Character Sets — Latin Alphabets No. 1 to No. 4 2nd edition (June 1986)
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The backslash (\) escape character typically provides two ways to include double-quotes inside a string literal, either by modifying the meaning of the double-quote character embedded in the string (\" becomes "), or by modifying the meaning of a sequence of characters including the hexadecimal value of a double-quote character (\x22 becomes ").