Execute python3 system with PHP exec () on AWS EC2

Using Python 3 series on Amazon Linux I solved it by the method of this blog, but I will supplement and introduce the part that I thought was a little insufficient for myself.

Main premise: Install Pyenv in /usr/bin/ ..

In other blogs, I think that pyenv is installed in/home/ec2-user/..., but since the ec2-user directory has strict privileges, install python3 in it, for example. , Exec (/home/ec2-user/.../bin/python3.7)

permission denied

Will be. However, if you rewrite the permissions of the home directory and ec2-user directory, is it a security specification? Or something, the horrifying thing that scp or ssh can't get into the server happens. (If that happens, you can fix it by opening a terminal from the AWS ec2 instance page.)

1. Install the libraries required to use pyenv

$ sudo yum install gcc gcc-c++ make git openssl-devel bzip2-devel zlib-devel readline-devel sqlite-devel

2. Install pyenv, set permissions and paths

$ sudo git clone https://github.com/yyuu/pyenv.git /usr/bin/.pyenv
$ cd /usr/bin/.pyenv
$ sudo mkdir shims
$ sudo mkdir versions

3. Change the permissions of the installed folder so that it can be accessed from exec.

$ sudo chown -R ec2-user:apache /usr/bin/.pyenv

#Or if apache is not installed
$ sudo chown -R ec2-user:ec2-user /usr/bin/.pyenv

4. Let's set the path

There are other blogs that have detailed information on setting the path, so please check that out. Use the vim editor to open .bashrc.

vi ~/.bashrc

Add this.

export PYENV_ROOT="/usr/bin/.pyenv"
if [ -d "${PYENV_ROOT}" ]; then
    export PATH=${PYENV_ROOT}/bin:$PATH
    eval "$(pyenv init -)"
fi

Reload in the rewritten state.

$ source ~/.bashrc

5. Install python with pyenv normally

This time I will install python3.7.0 properly. Even if you install it, it remains python on the existing system

$ pyenv install 3.7.0
$ python -V
Python 2.7.12

In this way, the mode is changed to python 3.7.0.

$ pyenv global 3.7.0
$ python -V
Python 3.7.0

6. Run python3 in php.

If you go through the location where you just installed it, you will find the location where python3.7 is installed. 「/usr/bin/.pyenv/versions/3.7.0/bin/python3.7」 __ With this, you can use python3.7. __ The following two are the same, just looking the same through the __path. __

$ python

$ /usr/bin/.pyenv/versions/3.7.0/bin/python3.7

You can now use python3.7.0 with php. As a test, let's use exec () like this. You can use python3.7 properly.

$command = "/usr/bin/.pyenv/versions/3.7.0/bin/python3.7 -V";
exec($command, $output, $return_var);
$json_array = json_encode($output);
echo $json_array