(PHP 4 >= 4.0.0)
addcslashes -- Quote string with slashes in a C style
Description
string addcslashes (string str, string charlist)
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.
|
Example 1. addcslashes() example
$escaped = addcslashes($not_escaped, "\0..\37!@\177..\377");
|
|
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.
|
Also, if the first character in a range has a lower ASCII value than the second character in the
range, no range will be constructed. Only the start, end and period characters will be escaped. Use
the ord() function to find the ASCII value for a character.
|
