Fungsi-fungsi Kompatibilitas¶

CodeIgniter provides a set of compatibility functions that enable you to use functions what are otherwise natively available in PHP, but only in higher versions or depending on a certain extension.

Being custom implementations, these functions will also have some set of dependencies on their own, but are still useful if your PHP setup doesn’t offer them natively.

Catatan

Much like the common functions <common_functions>, the compatibility functions are always available, as long as their dependencies are met.

Password Hashing
Hash (Message Digest)
- Dependencies
- Function reference
Multibyte String
- Dependencies
- Function reference
Standard Functions
- Dependencies
- Function reference

Password Hashing ¶

This set of compatibility functions offers a “backport” of PHP’s standard Password Hashing extension that is otherwise available only since PHP 5.5.

Dependencies ¶

PHP 5.3.7
CRYPT_BLOWFISH support for crypt()

Function reference ¶

password_get_info($hash)¶

Parameter:	$hash (string) – Password hash
Kembali:	Information about the hashed password
Return type:	array

For more information, please refer to the PHP manual for password_get_info().

password_hash($password, $algo[, $options = array()])¶

Parameter:	$password (string) – Plain-text password $algo (int) – Hashing algorithm $options (array) – Hashing options
Kembali:	Hashed password or FALSE on failure
Return type:	string

For more information, please refer to the PHP manual for password_hash().

Catatan

Unless you provide your own (and valid) salt, this function has a further dependency on an available CSPRNG source. Each of the following would satisfy that: - mcrypt_create_iv() with MCRYPT_DEV_URANDOM - openssl_random_pseudo_bytes() - /dev/arandom - /dev/urandom

password_needs_rehash()¶

Parameter:	$hash (string) – Password hash $algo (int) – Hashing algorithm $options (array) – Hashing options
Kembali:	TRUE if the hash should be rehashed to match the given algorithm and options, FALSE otherwise
Return type:	bool

For more information, please refer to the PHP manual for password_needs_rehash().

password_verify($password, $hash)¶

Parameter:	$password (string) – Plain-text password $hash (string) – Password hash
Kembali:	TRUE if the password matches the hash, FALSE if not
Return type:	bool

For more information, please refer to the PHP manual for password_verify().

Hash (Message Digest)¶

This compatibility layer contains backports for the hash_equals() and hash_pbkdf2() functions, which otherwise require PHP 5.6 and/or PHP 5.5 respectively.

Dependencies ¶

None

Function reference ¶

hash_equals($known_string, $user_string)¶

Parameter:	$known_string (string) – Known string $user_string (string) – User-supplied string
Kembali:	TRUE if the strings match, FALSE otherwise
Return type:	string

For more information, please refer to the PHP manual for hash_equals().

hash_pbkdf2($algo, $password, $salt, $iterations[, $length = 0[, $raw_output = FALSE]])¶

Parameter:	$algo (string) – Hashing algorithm $password (string) – Password $salt (string) – Hash salt $iterations (int) – Number of iterations to perform during derivation $length (int) – Output string length $raw_output (bool) – Whether to return raw binary data
Kembali:	Password-derived key or FALSE on failure
Return type:	string

For more information, please refer to the PHP manual for hash_pbkdf2().

Multibyte String ¶

This set of compatibility functions offers limited support for PHP’s Multibyte String extension. Because of the limited alternative solutions, only a few functions are available.

Catatan

When a character set parameter is ommited, $config['charset'] will be used.

Dependencies ¶

iconv extension

Penting

This dependency is optional and these functions will always be declared. If iconv is not available, they WILL fall-back to their non-mbstring versions.

Penting

Where a character set is supplied, it must be supported by iconv and in a format that it recognizes.

Catatan

For you own dependency check on the actual mbstring extension, use the MB_ENABLED constant.

Function reference ¶

mb_strlen($str[, $encoding = NULL])¶

Parameter:	$str (string) – Input string $encoding (string) – Character set
Kembali:	Number of characters in the input string or FALSE on failure
Return type:	string

For more information, please refer to the PHP manual for mb_strlen().

mb_strpos($haystack, $needle[, $offset = 0[, $encoding = NULL]])¶

Parameter:	$haystack (string) – String to search in $needle (string) – Part of string to search for $offset (int) – Search offset $encoding (string) – Character set
Kembali:	Numeric character position of where $needle was found or FALSE if not found
Return type:	mixed

For more information, please refer to the PHP manual for mb_strpos().

mb_substr($str, $start[, $length = NULL[, $encoding = NULL]])¶

Parameter:	$str (string) – Input string $start (int) – Position of first character $length (int) – Maximum number of characters $encoding (string) – Character set
Kembali:	Portion of $str specified by $start and $length or FALSE on failure
Return type:	string

For more information, please refer to the PHP manual for mb_substr().

Standard Functions ¶

This set of compatibility functions offers support for a few standard functions in PHP that otherwise require a newer PHP version.

Dependencies ¶

None

Function reference ¶

array_column(array $array, $column_key[, $index_key = NULL])¶

Parameter:	$array (array) – Array to fetch results from $column_key (mixed) – Key of the column to return values from $index_key (mixed) – Key to use for the returned values
Kembali:	An array of values representing a single column from the input array
Return type:	array

For more information, please refer to the PHP manual for array_column().

array_replace(array $array1[, ...])¶

Parameter:	$array1 (array) – Array in which to replace elements ... (array) – Array (or multiple ones) from which to extract elements
Kembali:	Modified array
Return type:	array

For more information, please refer to the PHP manual for array_replace().

array_replace_recursive(array $array1[, ...])¶

Parameter:	$array1 (array) – Array in which to replace elements ... (array) – Array (or multiple ones) from which to extract elements
Kembali:	Modified array
Return type:	array

For more information, please refer to the PHP manual for array_replace_recursive().

Penting

Only PHP’s native function can detect endless recursion. Unless you are running PHP 5.3+, be careful with references!

hex2bin($data)¶

Parameter:	$data (array) – Hexadecimal representation of data
Kembali:	Binary representation of the given data
Return type:	string

For more information, please refer to the PHP manual for hex2bin().

quoted_printable_encode($str)¶

Parameter:	$str (string) – Input string
Kembali:	8bit-encoded string
Return type:	string

For more information, please refer to the PHP manual for quoted_printable_encode().