passthru
passthru
Execute an external program and display raw output
**passthru** string $command int $result_code
The function is similar to the
function in that it executes a
. This function
should be used in place of or
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 and
then calling a pbmplus program to output a gif, you can create
PHP scripts that output images directly.
passthru``exec``command``exec``system``image/gif
commandThe command that will be executed.
result_code
If the argument is present, the
return status of the Unix command will be placed here.
result_code
return.nullorfalse
Will emit an if
is unable to execute the .
E_WARNING``passthru``command
Throws a if
is empty or contains null bytes.
ValueError``command
exec``system``popen``escapeshellcmdbacktick operator