Returns a string with backslashes before characters that
are listed in charlist
parameter. It escapes \n, \r etc. in C-like style, characters with ASCII
code lower than 32 and higher than 126 are converted to octal
representation.
Be careful if you choose to escape characters 0, a, b,
f, n, r, t and v. They will be converted to \0, \a, \b, \f,
\n, \r, \t and \v. In PHP \0 (NULL), \r (carriage return), \n
(newline) and \t (tab) are predefined escape sequences, while
in C all of these are predefined escape sequences.
charlist like
"\0..\37", which would escape all characters with ASCII code
between 0 and 31.
When you define a sequence of characters in the charlist
argument make sure that you know what characters come between
the characters that you set as the start and end of the
range.
echo addcslashes('foo[ ]', 'A..z'); // output: \f\o\o\[ \] // All upper and lower-case letters will be escaped // ... but so will the [\]^_` and any tabs, line // feeds, carriage returns, etc. |
See also stripcslashes(),
stripslashes(),
htmlspecialchars(), and
quotemeta().