sodium_memcmp

Function • Misc changes in PHP 8.2

Test for equality in constant-time.

PHP 5

PHP 7.0-7.1

Added

PHP 7.3-7.4

Improved

PHP 8.1-8.2

PHP 8.3-8.4

PHP 8.5

PHP 8.6

`sodium_memcmp` Function synopsis

sodium_memcmp(string $string1, string $string2): int

Parameters

`$string1`

Typestring

String to compare

`$string2`

Typestring

Other string to compare

Return value

Typeint

Returns 0 if both strings are equal; -1 otherwise.

Changes to the `sodium_memcmp` Function

PHP 8.2

Attribute added for parameter $string1: #[SensitiveParameter]
Attribute added for parameter $string2: #[SensitiveParameter]

PHP 8.0

Return type added: int
Parameter name of parameter #1 changed: $string_1 to $string1
Parameter type added for parameter #1 ($string1): string
Parameter name of parameter #2 changed: $string_2 to $string2
Parameter type added for parameter #2 ($string2): string

- sodium_memcmp($string_1, $string_2)
+ sodium_memcmp(string $string1, string $string2): int

PHP 7.2

Function added

`sodium_memcmp` Function Availability

PHP Version	Availability
PHP 8.6Upcoming Release	Yes
PHP 8.5Supported (Latest)	Yes
PHP 8.4Supported	Yes
PHP 8.3Supported	Yes
PHP 8.2Security-Fixes Only	Yes
PHP 8.1Security-Fixes Only	Yes
PHP 8.0Unsupported	Yes
PHP 7.4Unsupported	Yes
PHP 7.3Unsupported	Yes
PHP 7.2Unsupported	Yes
PHP 7.1Unsupported	No
PHP 7.0Unsupported	No
PHP 5.6Unsupported	No
PHP 5.5Unsupported	No
PHP 5.4Unsupported	No
PHP 5.3Unsupported	No