\\d*\\.?\\d+)(?Ppt|px|em)?$/i'; /** * @var bool */ protected $valid; /** * @var string */ protected $size = ''; /** * @var string */ protected $unit = ''; public function __construct(string $size) { $this->valid = (bool) \preg_match(self::REGEXP_SIZE_VALIDATION, $size, $matches); if ($this->valid) { $this->size = $matches['size']; $this->unit = $matches['unit'] ?? 'pt'; } } public function valid() : bool { return $this->valid; } public function size() : string { return $this->size; } public function unit() : string { return $this->unit; } public function __toString() { return $this->size . $this->unit; } }