note 120273 added to language.operators.execution

You can use variables within a pair of backticks (``). <?php $host = 'www.wuxiancheng.cn'; echo ping -n 3 {$host}; ?> ---- Server IP: 72.52.91.14 Probable Submitter: 118.117.77.195 ---- Manual Page -- http://php.net/manual/en/language.operators.execution.php Edit -- https://master.php.net/note/edit/120273 Del: integrated -- https://master.php.net/note/delete/120273/integrated Del: useless -- https://master.php.net/note/delete/120273/useless Del: bad code -- https://master.php.net/note/delete/120273/bad+code Del: spam -- https://master.php.net/note/delete/120273/spam Del: non-english -- https://master.php.net/note/delete/120273/non-english Del: in docs -- https://master.php.net/note/delete/120273/in+docs Del: other reasons-- https://master.php.net/note/delete/120273 Reject -- https://master.php.net/note/reject/120273 Search -- https://master.php.net/manage/user-notes.php