unserialize

Function • Params and return types changed in PHP 8.0

Creates a PHP value from a stored representation.

PHP 5

Improved

PHP 7.1-7.4

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

unserialize(string $data, array $options = []): mixed

Typestring

The serialized string.

OptionalTypearrayDefault value[]

Any options to be provided to unserialize, as an associative array.

Typemixed

The converted value is returned, and can be a bool, int, float, string, array or object.

In case the passed string is not unserializeable, false is returned and E_WARNING is issued.

Changes to the `unserialize` Function

Return type added: mixed
Parameter name of parameter #1 changed: $variable_representation to $data
Parameter type added for parameter #1 ($data): string
Parameter name of parameter #2 changed: $allowed_classes to $options
Parameter type added for parameter #2 ($options): array
Parameter default value added for position #2 ($options): []

- unserialize($variable_representation, $allowed_classes)
+ unserialize(string $data, array $options = []): mixed

- unserialize($variable_representation)
+ unserialize($variable_representation, $allowed_classes)