[PHP-NOTES] note 130566 added to language.attributes.syntax

Attribute Subclassing https://3v4l.org/8jqK3#vnull

<?php /** @author ciid */

#[Attribute(Attribute::TARGET_PROPERTY)]
class PropertyAttributes {
    public function __construct(
        public readonly ?string $name = null,
        public readonly ?string $label = null,
    ) {}
 }

#[Attribute(Attribute::TARGET_PROPERTY)]
class IntegerPropertyAttributes extends PropertyAttributes {
    public function __construct(
        ?string $name = null,
        ?string $label = null,
        public readonly ?int $default = null,
        public readonly ?int $min = null,
        public readonly ?int $max = null,
        public readonly ?int $step = null,
    ) { parent::__construct($name, $label); }
 }

#[Attribute(Attribute::TARGET_PROPERTY)]
class FloatPropertyAttributes extends PropertyAttributes {
    public function __construct(
        ?string $name = null,
        ?string $label = null,
        public readonly ?float $default = null,
        public readonly ?float $min = null,
        public readonly ?float $max = null,
    ) { parent::__construct($name, $label); }
 }

// model class with properties to edit in UI
class MyClass {
     #[IntegerPropertyAttributes('prop','property: ',5,0,10,1)]
     public int $prop;
     #[FloatPropertyAttributes('float','double: ',5.5,0.0,9.9)]
     public float $double;
 }

// index.php implementation
$props = [['MyClass', 'prop'], ['MyClass', 'double']];

foreach ($props as $prop) {        // class, property
    $refl = new ReflectionProperty($prop[0], $prop[1]);
    $reflAttrs = $refl->getAttributes();
    foreach ($reflAttrs as $attr)
        echo buildHtmlFormControl($attr->newInstance());
  }
/** TL:DR: */
function buildHtmlFormControl(PropertyAttributes $args): string {
    $html = [];
    $html[] = "<label>{$args->label} <input name=\"{$args->name}\" value=\"{$args->default}\"";
    switch ($args::class) {
        case 'IntegerPropertyAttributes':
            $html[] = " type=\"number\" min=\"{$args->min}\" max=\"{$args->max}\" step=\"{$args->step}\""; break;
        case 'FloatPropertyAttributes':
            $html[] = " type=\"number\" min=\"{$args->min}\" max=\"{$args->max}\""; break;
     }
    $html[] = "></label>\n";
    return implode('', $html);
 }
?>
----
Server IP: 206.189.2.9
Probable Submitter: 1.123.64.57
----
Manual Page -- https://php.net/manual/en/language.attributes.syntax.php
Edit        -- https://main.php.net/note/edit/130566
Del: integrated  -- https://main.php.net/note/delete/130566/integrated
Del: useless     -- https://main.php.net/note/delete/130566/useless
Del: bad code    -- https://main.php.net/note/delete/130566/bad+code
Del: spam        -- https://main.php.net/note/delete/130566/spam
Del: non-english -- https://main.php.net/note/delete/130566/non-english
Del: in docs     -- https://main.php.net/note/delete/130566/in+docs
Del: other reasons-- https://main.php.net/note/delete/130566
Reject      -- https://main.php.net/note/reject/130566
Search      -- https://main.php.net/manage/user-notes.php