String Funkcjeaddcslashes
(PHP 4, PHP 5)
addcslashes — Quote string with slashes in a C style
Opis
$str
, string $charlist
)
Returns a string with backslashes before characters that are
listed in charlist parameter.
Parametry
-
str -
The string to be escaped.
-
charlist -
A list of characters to be escaped. If
charlistcontains characters \n, \r etc., they are converted in C-like style, while other non-alphanumeric characters with ASCII codes lower than 32 and higher than 126 converted to octal representation.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.
Also, if the first character in a range has a higher 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.<?php
echo addcslashes('foo[ ]', 'A..z');
// output: \f\o\o\[ \]
// All upper and lower-case letters will be escaped
// ... but so will the [\]^_`
?><?php
echo addcslashes("zoo['.']", 'z..A');
// output: \zoo['\.']
?>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), \f (form feed), \v (vertical tab) and \t (tab) are predefined escape sequences, while in C all of these are predefined escape sequences.
Zwracane wartości
Returns the escaped string.
Rejestr zmian
| Wersja | Opis |
|---|---|
| 5.2.5 | The escape sequences \v and \f were added. |
Przykłady
charlist like "\0..\37", which would
escape all characters with ASCII code between 0 and 31.
Przykład #1 addcslashes() example
<?php
$escaped = addcslashes($not_escaped, "\0..\37!@\177..\377");
?>
Zobacz też:
- stripcslashes() - Un-quote string quoted with addcslashes
- stripslashes() - Un-quotes a quoted string
- addslashes() - Quote string with slashes
- htmlspecialchars() - Convert special characters to HTML entities
- quotemeta() - Quote meta characters
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User Contributed Notes
addcslashes - [8 notes]