请问php如何调用linux命令

chong1688

求助：请问php如何调用linux命令，如何显示linux命令运行结果？！

半根の煙草

exec($str);
$str 为linux命令

半根の煙草

string exec ( string command [, array output [, int return_var]])
exec() executes the given command, however it does not output anything. It simply returns the last line from the result of the command. 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.

void passthru ( string command [, int return_var])


The passthru() function is similar to the exec() function in that it executes a command. If the return_var argument is present, the return status of the Unix command will be placed here. This function should be used in place of exec() or system() when the output from the Unix command is binary data which needs to be passed directly back to the browser. A common use for this is to execute something like the pbmplus utilities that can output an image stream directly. By setting the Content-type to image/gif and then calling a pbmplus program to output a gif, you can create PHP scripts that output images directly.

Yuri

不知道有没有system()