PHP ʖ²ἯTH º󍋼/A LXXXIII. Program Execution functions ½鉜 Those functions provides means to executes commands on the system itself, and means secure such commands. Шdz ΞШ͢²¿¿⎄¼þ¾ͿɒԼӈ뱾)չģ¿鵄֧³֡£ °²װ բЩº¯ʽ׷Ϊ PHP ºːĵĒ»²¿·֣¬ΞШ±»°²װ¼´¿Ɋ¹Ӄ¡£ ԋАʱŤփ ¸À©չģ¿鎴¶¨ҥȎºΉ薃ָn¡£ ׊Դ Ѝ ¸À©չģ¿鎴¶¨ҥȎºΗʔ´ Ѝ¡£ Ԥ¶¨ҥ³£ ¸À©չģ¿鎴¶¨ҥȎºγ£¡£ Ϡ¹زο¼ These functions are also closely related to the backtick operator. Also, while in Safe Mode you must consider the safe_mode_exec_dir directive. Ŀ¼ escapeshellarg -- escape a string to be used as a shell argument escapeshellcmd -- escape shell metacharacters exec -- Execute an external program passthru -- Execute an external program and display raw output proc_close -- Close a process opened by proc_open and return the exit code of that process. proc_open -- Execute a command and open file pointers for input/output shell_exec -- Execute command via shell and return complete output as string system -- Execute an external program and display output º󍋼/A ưµ㼯A pcntl_wtermsig ɏһ¼¶ escapeshellarg