shm_attach

Function • Params and return types changed in PHP 8.0

Creates or open a shared memory segment.

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6

shm_attach Function synopsis

shm_attach(
    int $key,
    ?int $size = null,
    int $permissions = 0666
  ): SysvSharedMemory|false

Parameters

$key

Typeint

$size

OptionalType?intDefault valuenull

$permissions

OptionalTypeintDefault value0666

Return value

TypeSysvSharedMemory|false

Changes to the shm_attach Function

PHP 8.0

  • Return type added: SysvSharedMemory|false
  • Parameter type added for parameter #1 ($key): int
  • Parameter name of parameter #2 changed: $memsize to $size
  • Parameter type added for parameter #2 ($size): ?int
  • Parameter default value added for position #2 ($size): null
  • Parameter name of parameter #3 changed: $perm to $permissions
  • Parameter type added for parameter #3 ($permissions): int
  • Parameter default value added for position #3 ($permissions): 0666
  shm_attach(
-     $key,
+     int $key,
-     $memsize,
+     ?int $size = null,
-     $perm
+     int $permissions = 0666
-   )
+   ): SysvSharedMemory|false

shm_attach Function Availability

PHP VersionAvailability
PHP 8.6Upcoming Release Yes
PHP 8.5Supported (Latest) Yes
PHP 8.4Supported Yes
PHP 8.3Security-Fixes Only Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Unsupported Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported Yes
PHP 5.3Unsupported Yes