Passing data between PHP and C executable in linux

Question

Under Linux ,if I want to pass pure string from PHP to C, how do i do that? what I\'ve tried do far is:

exec(\"./myexec.bin -a mystring\");

Answer 1

You could use popen() to open a pipe to the executable:

$fp = popen('./myexec.bin', 'w');
fwrite($fp, $data);
pclose($fp);

Then, as previously suggested, read from stdin in your C program:

fopen(stdin, "r");
// ...

It is "safer" to use popen() rather than exec('/bin/echo') because you can write characters that would otherwise be interpreted by the shell (&, |, ...). Note that the handle returned from PHP's popen() must be closed with pclose().