PHP Class: x_class_perm

The x_class_perm class provides a comprehensive system for managing permissions associated with references in a database. It supports creating tables, retrieving, adding, and removing permissions for specific references.

Use the class by including /_framework/classes/x_class_perm.php.

Dependencies

• PHP 7.0-7.4
• PHP 8.0-8.4

PHP-Modules

• mysqli: The PHP MySQLi extension must be installed and enabled.

PHP-Classes

• x_class_mysql: Required for database operations.

Table

This section describes the table structure used by the Permissions class to store permissions for various objects. The table is automatically created by the class if required for its functionality. Below is a summary of the columns and keys used in the table, along with their purposes.

The table will be automatically installed upon constructor execution.

Column Name	Data Type	Attributes	Description
id	int(10)	NOT NULL, AUTO_INCREMENT, PRIMARY KEY	A unique identifier for each permission entry, ensuring that each record can be individually tracked.
ref	int(10)	NOT NULL	A reference number associated with the permission, used to link the permission to a specific object or entity.
content	text	NOT NULL	Contains the permission data in serialized or structured format, defining the access rights.
section	varchar(128)	DEFAULT NULL	For Multi Site Purposes to split database data in categories.
creation	datetime	DEFAULT CURRENT_TIMESTAMP	The timestamp when the permission entry was created. Automatically set upon insertion.
modification	datetime	DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP	The timestamp of the last modification to the permission entry. Automatically updated on changes.

Key Name	Key Type	Columns	Usage
PRIMARY KEY	Primary	id	Ensures that each permission entry is uniquely identifiable.
x_class_perm	Unique	ref, section	Ensures that each combination of reference and section is unique, preventing duplicate permissions for the same section.

Methods

__construct(...)

Initializes an instance of the x_class_perm class and creates the table if it does not exist.

Parameter	Type	Description
$mysql	object	An instance of the MySQL class used for database operations.
$tablename	string	The name of the table where permissions are stored.
$section	string	Optional section identifier for permissions. Default is an empty string.

create_table(...)

Creates the permissions table if it does not exist.

Parameter	Type	Description
None	-	Creates a table with columns for ID, reference, content, section, creation, and modification timestamps.

get_perm(...)

Retrieves permissions for a specific reference.

Parameter	Type	Description
$ref	int	The reference identifier to get permissions for.

Returns: array - An array of permissions associated with the reference.

has_perm(...)

Checks if a specific permission is assigned to a reference.

Parameter	Type	Description
$ref	int	The reference identifier to check permissions for.
$permname	string	The name of the permission to check.

Returns: bool - true if the permission exists, false otherwise.

add_perm(...)

Adds a new permission to a reference.

Parameter	Type	Description
$ref	int	The reference identifier to add a permission to.
$permname	string	The name of the permission to add.

Returns: bool - Always returns true if the operation is successful.

check_perm(...)

Checks if a reference has multiple permissions.

Parameter	Type	Description
$ref	int	The reference identifier to check permissions for.
$array	array	Array of permission names to check.
$or	bool	Optional. If true, checks if any permission matches; if false, checks if all match. Default is false.

Returns: bool - true if the condition is met based on the $or parameter.

set_perm(...)

Sets permissions for a specific reference.

Parameter	Type	Description
$ref	int	The reference identifier to set permissions for.
$array	array	The array of permissions to set.

Returns: bool - true if the operation is successful.

remove_perm(...)

Removes a specific permission from a reference.

Parameter	Type	Description
$ref	int	The reference identifier to remove a permission from.
$permname	string	The name of the permission to remove.

Returns: bool - true if the operation is successful.

remove_perms(...)

Removes all permissions for a specific reference.

Parameter	Type	Description
$ref	int	The reference identifier to remove all permissions for.

Returns: bool - true if the operation is successful.

delete_ref(...)

Deletes a reference and its associated permissions from the table.

Parameter	Type	Description
$ref	int	The reference identifier to delete from the table.

Returns: bool - true if the operation is successful.

item(...)

Gets an instance of x_class_perm_item for a specific reference.

Parameter	Type	Description
$ref	int	The reference identifier for which to get an item.

Returns: x_class_perm_item - An instance of the x_class_perm_item class with permissions for the specified reference.