sodium_memzero

Function • Params and return types changed in PHP 8.0

Overwrite a string with NUL characters.

PHP 5

PHP 7.0-7.1

Added

PHP 7.3-7.4

Improved

PHP 8.1

PHP 8.2

PHP 8.3

PHP 8.4

PHP 8.5

`sodium_memzero` Function synopsis

sodium_memzero(string &$string): void

Parameters

`$string`

Passed by referenceTypestring

String.

Note that the parameter $string is passed by reference, and contains additional/updated context data that may be useful.

Return value

The sodium_memzero function is a void function; it does not return any values.

Changes to the `sodium_memzero` Function

PHP 8.0

Return type added: void
Parameter name of parameter #1 changed: $reference to $string
Parameter type added for parameter #1 ($string): string

- sodium_memzero(&$reference)
+ sodium_memzero(string &$string): void

PHP 7.2

Function added

`sodium_memzero` Function Availability

PHP Version	Availability
PHP 8.5Future Release	Yes
PHP 8.4Upcoming Release	Yes
PHP 8.3Supported (Latest)	Yes
PHP 8.2Supported	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