system Execute an external program and display the output &reftitle.description; stringsystem stringcommand intreturn_var system is just like the C version of the function in that it executes the given command and outputs the result. The system call also tries to automatically flush the web server's output buffer after each line of output if PHP is running as a server module. If you need to execute a command and have all the data from the command passed directly back without any interference, use the passthru function. &reftitle.parameters; command The command that will be executed. return_var If the return_var argument is present, then the return status of the executed command will be written to this variable. &reftitle.returnvalues; Returns the last line of the command output on success, and &false; on failure. &reftitle.examples; '; // Outputs all the result of shellcommand "ls", and returns // the last output line into $last_line. Stores the return value // of the shell command in $retval. $last_line = system('ls', $retval); // Printing additional info echo '

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Last line of the output: ' . $last_line . '

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Return value: ' . $retval; ?> ]]> &reftitle.notes; &warn.escapeshell; ¬e.exec-bg; ¬e.exec-path; &warn.sm.exec; &reftitle.seealso; exec passthru popen escapeshellcmd pcntl_exec backtick operator