array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'function.filter-has-var.php', 1 => 'filter_has_var', ), 'up' => array ( 0 => 'ref.filter.php', 1 => '过滤器函数', ), 'prev' => array ( 0 => 'ref.filter.php', 1 => '过滤器函数', ), 'next' => array ( 0 => 'function.filter-id.php', 1 => 'filter_id', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'zh', 'path' => 'reference/filter/functions/filter-has-var.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
filter_has_var — 检测是否存在指定类型的变量