shigemk2 https://blog.hatena.ne.jp/shigemk2/ by shigemk2 https://www.shigemk2.com/ php PHP: 参照カウント法の原理 - Manual 特定の変数のコンテナ関連の情報を知るための変数 要インストール xdebug <?php $a = "new string"; $c = $b = $a; xdebug_debug_zval( 'a' ); unset( $b, $c ); xdebug_debug_zval( 'a' ); $a = null; xdebug_debug_zval( 'a' ); $a = array( 'meaning' => 'life', 'number' => 42 ); xdebug_debug_zval( 'a' ); ?> refcount いく… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20120228%2F1330431997" title="xdebug_debug_zval() - by shigemk2" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2012-02-28 21:26:37 rich https://www.shigemk2.com/entry/20120228/1330431997 1.0 100%