protected function getParentEnv()
    {
        if (PHP_VERSION_ID >= 70100) {
            return getenv();
        }
        // In PHP <7.1 there isn't a way to read all of the current environment
        // variables. If PHP is running with a variables_order that includes
        // 'e', then $_ENV should be populated.
        if (!empty($_ENV) && stripos(ini_get('variables_order'), 'e') !== false) {
            return $_ENV;
        }

        // If $_ENV is empty, then we can only use a whitelist of all the
        // variables that we might want to use.
        $candidates = [
            'TERM',
            'TERM_SESSION_ID',
            'TMPDIR',
            'SSH_AGENT_PID',
            'SSH_AUTH_SOCK',
            'PATH',
            'LANG',
            'LC_ALL',
            'LC_CTYPE',
            'PAGER',
            'LESS',
        ];
        $variables = [];
        foreach ($candidates as $name) {
            $variables[$name] = getenv($name);
        }

        return array_filter($variables, function ($value) {
            return $value !== false;
        });
    }
protected function getParentEnv()
    {
        if (PHP_VERSION_ID >= 70100) {
            return getenv();
        }
        // In PHP <7.1 there isn't a way to read all of the current environment
        // variables. If PHP is running with a variables_order that includes
        // 'e', then $_ENV should be populated.
        if (!empty($_ENV) && stripos(ini_get('variables_order'), 'e') !== false) {
            return $_ENV;
        }

        // If $_ENV is empty, then we can only use a whitelist of all the
        // variables that we might want to use.
        $candidates = [
            'TERM',
            'TERM_SESSION_ID',
            'TMPDIR',
            'SSH_AGENT_PID',
            'SSH_AUTH_SOCK',
            'PATH',
            'LANG',
            'LC_ALL',
            'LC_CTYPE',
            'PAGER',
            'LESS',
        ];
        $variables = [];
        foreach ($candidates as $name) {
            $variables[$name] = getenv($name);
        }

        return array_filter($variables, function ($value) {
            return $value !== false;
        });
    }
protected function getParentEnv ( ) { if ( PHP_VERSION_ID >= 70100 ) { return getenv ( ) ; } // In PHP <7.1 there isn't a way to read all of the current environment // variables. If PHP is running with a variables_order that includes // 'e', then $_ENV should be populated. if ( ! empty ( $ _ENV ) && stripos ( ini_get ( 'variables_order' ) , 'e' ) !== false ) { return $ _ENV ; } // If $_ENV is empty, then we can only use a whitelist of all the // variables that we might want to use. $ candidates = [ 'TERM' , 'TERM_SESSION_ID' , 'TMPDIR' , 'SSH_AGENT_PID' , 'SSH_AUTH_SOCK' , 'PATH' , 'LANG' , 'LC_ALL' , 'LC_CTYPE' , 'PAGER' , 'LESS' , ] ; $ variables = [ ] ; foreach ( $ candidates as $ name ) { $ variables [ $ name ] = getenv ( $ name ) ; } return array_filter ( $ variables , function ( $ value ) { return $ value !== false ; } ) ; }
Attempt to read useful environment variables from the parent process.

@return array
Attempt to read useful environment variables from the parent process .