systemPHP ManualPrevNextsystemsystem -- Execute an external program and display outputDescriptionstring system(string command, int
[return_var]
);
System() is just like the C version of the
function in that it executes the given
command and outputs the result. If a
variable is provided as the second argument, then the return
status code of the executed command will be written to this
variable.
Note, that if you are going to allow data coming from user input
to be passed to this function, then you should be using the
EscapeShellCmd() function to make sure that
users cannot trick the system into executing arbitrary
commands.
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.
Returns the last line of the command output on success, and false
on failure.
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.
See also exec(),
PassThru(), popen(),
EscapeShellCmd(), and the backtick operator.
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