PHP calls the shell command "go"

Remember the command is not a file, at first I thought it was the result of the file.

PHP provides us with the three functions of system (), exec (), PassThru () to invoke external commands.
Although these three commands are capable of executing the shell commands of the Linux system, they are actually different:
System () outputs and returns the last line of the shell results.
EXEC () does not output results, returns the last line of the shell result, and all results can be saved to a returned array.
PassThru () only invokes the command and outputs the result of the command directly to the standard output device.
Same point: All can get status code of command execution

Example: System ("/usr/local/bin/webalizer/webalizer");

Baidu: http://zhidao.baidu.com/question/167869011.html

PHP calls the shell command "go"