Execute PHP from C. From http://stackoverflow.com/questions/2179465/execute-and-output-php-on-a-c-based-web-server-stuck

exec-php-from-c.c

char buf[BUFSIZ];
FILE *fp;

if ((fp= popen("/bin/php -f /webserver/pages/test.php", "r")) != NULL)
{
    /* Read from the PHP command output */ 
    while (fgets(buf, BUFSIZ, fp) != NULL)
    {
        /* Process the output from PHP as desired */
        ...
    } 

    (void) pclose(ptr);
}

fclose(fp);