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<?php |
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namespace Drupal\qa; |
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/** |
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* A lifetime class. |
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* |
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* Properties are: Start, Access, Modify, End. |
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* |
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* Note: SAME is an old (ca 2005) OSInet PHP_lib class, which other modules may |
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* have imported in a non-namespaced form. |
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*/ |
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class Same { |
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/** |
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* Start timestamp. |
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* |
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* @var float |
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*/ |
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public $s; |
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/** |
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* Access timestamp. |
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* |
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* @var float |
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*/ |
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public $a; |
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/** |
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* Modification timestamp. |
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* |
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* @var float |
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*/ |
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public $m; |
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/** |
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* End timestamp. |
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* |
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* @var float |
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*/ |
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public $e; |
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/** |
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* Constructor |
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* |
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* S.A.M. default to current time, but E defaults to NULL. |
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* |
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* @param float $s |
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* @param float $a |
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* @param float $m |
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* @param float $e |
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*/ |
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public function __construct($s = 0.0, $a = 0.0, $m = 0.0, $e = 0.0) { |
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$now = microtime(TRUE); |
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foreach (['s', 'a', 'm'] as $ts) { |
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$this->$ts = ($$ts) ?: $now; |
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} |
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$this->e = $e; |
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} |
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/** |
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* Update the access timestamp. |
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* |
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* @param float $now |
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*/ |
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public function access($now = 0.0) { |
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$this->a = $now ?: microtime(); |
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} |
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/** |
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* Update the modification timestamp. |
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* |
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* @param float $now |
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*/ |
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public function modify($now = 0.0) { |
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if (empty($now)) { |
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$now = microtime(TRUE); |
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} |
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$this->access($now); |
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$this->m = $now; |
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} |
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/** |
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* Update the end timestamp. |
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* |
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* @param float $now |
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*/ |
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public function end($now = 0.0) { |
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if (empty($now)) { |
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$now = microtime(TRUE); |
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} |
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$this->modify($now); |
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$this->e = $now; |
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} |
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// Return the age of the instance, in microseconds. |
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public function age(): float { |
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if (!empty($this->e)) { |
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return $this->e - $this->s; |
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} |
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// Modifications imply update. |
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elseif (!empty($this->a)) { |
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return $this->a - $this->s; |
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} |
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return microtime(TRUE) - $this->s; |
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} |
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// Return the age of the instance in seconds, for use with UNIX timestamps. |
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public function unixAge(): int { |
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return intval($this->age() / 1E6); |
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} |
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public function __toString(): string { |
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return $this->age(); |
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} |
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} |
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OSInet /
qa
