<?php
$stdout = fopen("out.log", "a");
$tmp_fd = fildes_fileno($stdout);
if(fildes_dup2($tmp_fd, fildes_fileno(STDOUT))<0){
    fwrite(STDERR, "dup2 failed");
    exit;
}
fildes_close($tmp_fd);
echo "Hello world!"; // this goes to out.log

phpize;
./configure;
make;
make install;