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                PHP 支持一個執行運算符:反引號(``)。注意這不是單引號!PHP 將嘗試將反引號中的內容作為外殼命令來執行,并將其輸出信息返回(例如,可以賦給一個變量而不是簡單地丟棄到標準輸出)。 ~~~php <?php $output = `ls -al`; echo "<pre>$output</pre>"; ~~~ 注意,反引號運算符在激活了安全模式或者關閉了 shell\_exec() 時是無效的。
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