Oihana PHP System

Log extends Thing uses LogTrait

Represents a log entry.

This class defines a structured representation of a log message — including its date, time, level, and message — following the Oihana::SCHEMA context for JSON-LD interoperability.

It extends the Thing base type from Schema.org and uses LogTrait to provide common logging-related constants and methods.

Example

use xyz\oihana\schema\Log;

$log = new Log();
$log->date    = '2025-10-20';
$log->time    = '14:32:10';
$log->level   = 'INFO';
$log->message = 'Application started successfully.';

echo $log;
// Output: "2025-10-20 14:32:10 INFO Application started successfully."

print_r($log->toArray());
// [
//   'date'    => '2025-10-20',
//   'time'    => '14:32:10',
//   'level'   => 'INFO',
//   'message' => 'Application started successfully.'
// ]
Tags
author

Marc Alcaraz (ekameleon)

since
1.0.1

Table of Contents

Constants

CONTEXT  = \xyz\oihana\schema\constants\Oihana::SCHEMA
The @context of the json-ld representation of the thing.
DATE  = 'date'
The attribute key of the 'date' property.
JSON_PRIORITY_KEYS  = [\org\schema\constants\Schema::AT_TYPE, \org\schema\constants\Schema::AT_CONTEXT, \org\schema\constants\Schema::_KEY, \org\schema\constants\Schema::_FROM, \org\schema\constants\Schema::_TO, \org\schema\constants\Schema::ID, \org\schema\constants\Schema::NAME, \org\schema\constants\Schema::URL, \org\schema\constants\Schema::CREATED, \org\schema\constants\Schema::MODIFIED]
Defines the priority order of keys when serializing the object to JSON-LD.
LEVEL  = 'level'
The attribute key of the 'level' property.
MESSAGE  = 'message'
The attribute key of the 'message' property.
TIME  = 'time'
The attribute key of the 'time' property.

Properties

$_from  : string|null
The metadata to indicates the edge 'from' identifier.
$_id  : null|string
The metadata identifier of the item.
$_key  : null|string
The metadata unique key identifier of the thing.
$_rev  : null|string
The metadata revision value of the thing.
$_to  : string|null
The metadata to indicates the edge 'to' identifier.
$active  : bool|null
The active flag.
$additionalType  : array<string|int, mixed>|string|null|object
An additionalType for the item.
$alternateName  : string|object|array<string|int, mixed>|null
An alias for the item.
$created  : null|string
Date of creation of the resource.
$date  : string|null
The date of the log (YYYY-MM-DD).
$description  : string|object|array<string|int, mixed>|null
A short description of the item.
$disambiguatingDescription  : string|null
A sub property of description. A short description of the item used to disambiguate from other, similar items. Information from other properties (in particular, name) may be necessary for the description to be useful for disambiguation.
$hasPart  : string|Thing|array<string|int, Thing>|null
Indicates an item that this part of this item.
$id  : null|int|string
The unique identifier of the item.
$identifier  : string|null
The identifier of the item.
$image  : string|ImageObject|array<string|int, ImageObject|string>|null
The image reference of this resource.
$isPartOf  : string|Thing|array<string|int, Thing>|null
Indicates an item that this item is part of.
$level  : int|string|null
The level of the log (e.g., INFO, ERROR, DEBUG).
$license  : string|object|null
A legal document giving official permission to do something with the resource.
$mainEntityOfPage  : string|null
Indicates a page (or other CreativeWork) for which this thing is the main entity being described.
$message  : string|null
The message of the log.
$modified  : null|string
Date on which the resource was changed.
$name  : int|string|null
The name of the item.
$owner  : null|string|Thing
The owner of this Thing.
$potentialAction  : array<string|int, mixed>|Action|null
Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.
$publisher  : string|array<string|int, string|Person|Organization>|Person|Organization|null
The publisher of the resource.
$sameAs  : string|array<string|int, mixed>|null
URL of a reference Web page that unambiguously indicates the item's identity.
$subjectOf  : null|string|array<string|int, mixed>|CreativeWork|Event
A CreativeWork or Event about this Thing.
$time  : string|null
The time of the log.
$url  : int|string|null
URL of the item.
$atContext  : string|null
The JSON-LD `@context` value.
$atType  : string|null
The JSON-LD `@type` value.

Methods

__construct()  : mixed
Constructor to hydrate public properties from an array or stdClass.
__toString()  : string
Returns the string representation of the thing.
jsonSerialize()  : array<string|int, mixed>
Serializes the current object into a JSON-LD array.
toArray()  : array<string|int, mixed>
Returns the array representation of the log definition.
withAtContext()  : $this
Sets the internal JSON-LD `@context` attribute.
withAtType()  : $this
Sets the internal JSON-LD `@type` attribute.
withJSONLDMeta()  : $this
Initializes both JSON-LD metadata: `@type` and `@context`.

Constants

CONTEXT

The @context of the json-ld representation of the thing.

public mixed CONTEXT = \xyz\oihana\schema\constants\Oihana::SCHEMA

DATE

The attribute key of the 'date' property.

public mixed DATE = 'date'

JSON_PRIORITY_KEYS

Defines the priority order of keys when serializing the object to JSON-LD.

public array<string|int, string> JSON_PRIORITY_KEYS = [\org\schema\constants\Schema::AT_TYPE, \org\schema\constants\Schema::AT_CONTEXT, \org\schema\constants\Schema::_KEY, \org\schema\constants\Schema::_FROM, \org\schema\constants\Schema::_TO, \org\schema\constants\Schema::ID, \org\schema\constants\Schema::NAME, \org\schema\constants\Schema::URL, \org\schema\constants\Schema::CREATED, \org\schema\constants\Schema::MODIFIED]

Keys listed here will always appear first in the serialized array, in the order specified. All remaining public properties will be sorted alphabetically after these priority keys.

This ensures that important JSON-LD metadata and system fields (like @type, @context, _key, id, url, created, modified, etc.) appear at the top of the output for consistency and readability.

Usage:

$orderedKeys = self::JSON_PRIORITY_KEYS;

Notes:

  • Can be overridden in a subclass by redefining the constant.
  • Late static binding (static::JSON_PRIORITY_KEYS) allows child classes to modify the serialization order.

List of JSON-LD keys in priority order.

LEVEL

The attribute key of the 'level' property.

public mixed LEVEL = 'level'

MESSAGE

The attribute key of the 'message' property.

public mixed MESSAGE = 'message'

TIME

The attribute key of the 'time' property.

public mixed TIME = 'time'

Properties

$_from

The metadata to indicates the edge 'from' identifier.

public string|null $_from

$_id

The metadata identifier of the item.

public null|string $_id

$_key

The metadata unique key identifier of the thing.

public null|string $_key

$_rev

The metadata revision value of the thing.

public null|string $_rev

$_to

The metadata to indicates the edge 'to' identifier.

public string|null $_to

$active

The active flag.

public bool|null $active

$additionalType

An additionalType for the item.

public array<string|int, mixed>|string|null|object $additionalType

$alternateName

An alias for the item.

public string|object|array<string|int, mixed>|null $alternateName

$created

Date of creation of the resource.

public null|string $created

$date

The date of the log (YYYY-MM-DD).

public string|null $date

$description

A short description of the item.

public string|object|array<string|int, mixed>|null $description

$disambiguatingDescription

A sub property of description. A short description of the item used to disambiguate from other, similar items. Information from other properties (in particular, name) may be necessary for the description to be useful for disambiguation.

public string|null $disambiguatingDescription

$hasPart

Indicates an item that this part of this item.

public string|Thing|array<string|int, Thing>|null $hasPart

$id

The unique identifier of the item.

public null|int|string $id

$identifier

The identifier of the item.

public string|null $identifier

$isPartOf

Indicates an item that this item is part of.

public string|Thing|array<string|int, Thing>|null $isPartOf

$level

The level of the log (e.g., INFO, ERROR, DEBUG).

public int|string|null $level

$license

A legal document giving official permission to do something with the resource.

public string|object|null $license

$mainEntityOfPage

Indicates a page (or other CreativeWork) for which this thing is the main entity being described.

public string|null $mainEntityOfPage

$message

The message of the log.

public string|null $message

$modified

Date on which the resource was changed.

public null|string $modified

$name

The name of the item.

public int|string|null $name

$owner

The owner of this Thing.

public null|string|Thing $owner

Represents any entity (person, organization, system, or other object) that can be considered the possessor of this Thing.

$potentialAction

Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.

public array<string|int, mixed>|Action|null $potentialAction

$sameAs

URL of a reference Web page that unambiguously indicates the item's identity.

public string|array<string|int, mixed>|null $sameAs

E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website.

$subjectOf

A CreativeWork or Event about this Thing.

public null|string|array<string|int, mixed>|CreativeWork|Event $subjectOf

$time

The time of the log.

public string|null $time

$url

URL of the item.

public int|string|null $url

$atContext

The JSON-LD `@context` value.

private string|null $atContext = null

Default is https://schema.org.

$atType

The JSON-LD `@type` value.

private string|null $atType = null

This can be manually set or automatically inferred from the class name.

Methods

__construct()

Constructor to hydrate public properties from an array or stdClass.

public __construct([array<string|int, mixed>|object|null $init = null ]) : mixed

This allows objects to be quickly populated with associative data without manually setting each property.

Parameters
$init : array<string|int, mixed>|object|null = null

A data array or object used to initialize the instance. Keys must match public property names.

Tags
throws
ReflectionException
example 
use org\schema\Person;
use org\schema\constants\Prop;

$person = new Person
([
    Prop::NAME => 'Jane Doe',
    Prop::URL  => 'https://example.com/janedoe'
]);

echo $person->name; // Outputs: Jane Doe

__toString()

Returns the string representation of the thing.

public __toString() : string
Return values
string

jsonSerialize()

Serializes the current object into a JSON-LD array.

public jsonSerialize() : array<string|int, mixed>

Includes public properties, the JSON-LD @context and @type. Null values are automatically removed.

Tags
throws
ReflectionException

If reflection fails when accessing properties.

example 
use org\schema\Person;
use org\schema\constants\Prop;

$person = new Person
([
    Prop::NAME => 'John Smith',
    Prop::ID   => 'jsmith-001'
]);

echo json_encode($person, JSON_PRETTY_PRINT);

Output:

{
   "@type": "Person",
   "@context": "https://schema.org",
   "id": "jsmith-001",
   "name": "John Smith"
}
Return values
array<string|int, mixed> —

JSON-LD representation of the object.

toArray()

Returns the array representation of the log definition.

public toArray() : array<string|int, mixed>
Return values
array<string|int, mixed>

withAtContext()

Sets the internal JSON-LD `@context` attribute.

public withAtContext(string $context) : $this

Useful if you need a custom JSON-LD context.

Parameters
$context : string

Optional JSON-LD context.

Return values
$this

withAtType()

Sets the internal JSON-LD `@type` attribute.

public withAtType(string $type) : $this

Allows overriding the default type inferred from the class.

Parameters
$type : string

Optional JSON-LD type

Return values
$this

withJSONLDMeta()

Initializes both JSON-LD metadata: `@type` and `@context`.

public withJSONLDMeta([string|null $atType = null ][, string|null $atContext = null ]) : $this

Can be called from constructor or later to override default values.

Parameters
$atType : string|null = null

Optional JSON-LD type

$atContext : string|null = null

Optional JSON-LD context

Return values
$this 

        

        
    




    

    

                                

                

                                
    

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