我每天都在运行一个PHP文件（Crontab - 一切都在服务器[cli]上运行），位于我的服务器上以从API收集数据。我在我的过程中使用分叉，出于某种原因，我开始在/var/mail/root上显示这些错误。
From root@myserver Thu Nov 17 11:09:01 2016
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id D8D111040C1; Thu, 17 Nov 2016 11:09:01 +0200 (IST)
From: root@myserver (Cron Daemon)
To: root@myserver
Subject: Cron <root@myserver> [ -x /usr/lib/php/sessionclean ] && /usr/lib/php /sessionclean
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X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
Message-Id: <20161117090901.D8D111040C1@myserver>
Date: Thu, 17 Nov 2016 11:09:01 +0200 (IST)
PHP Warning: Module 'pcntl' already loaded in Unknown on line 0
我用Google搜索了错误并看到了这个页面： http://www.somacon.com/p520.php
表示我可能会多次加载prefork，运行php -v并不会输出任何错误。但它并不是因为它来自cli而不是apache2。
这些是cli使用的php.ini：
Loaded Configuration File: /etc/php/7.0/cli/php.ini
Scan for additional .ini files in: /etc/php/7.0/cli/conf.d
Additional .ini files parsed: /etc/php/7.0/cli/conf.d/10-mysqlnd.ini,
/etc/php/7.0/cli/conf.d/10-opcache.ini,
/etc/php/7.0/cli/conf.d/10-pdo.ini,
/etc/php/7.0/cli/conf.d/15-xml.ini,
/etc/php/7.0/cli/conf.d/20-calendar.ini,
/etc/php/7.0/cli/conf.d/20-ctype.ini,
/etc/php/7.0/cli/conf.d/20-curl.ini,
/etc/php/7.0/cli/conf.d/20-dom.ini,
/etc/php/7.0/cli/conf.d/20-exif.ini,
/etc/php/7.0/cli/conf.d/20-fileinfo.ini,
/etc/php/7.0/cli/conf.d/20-ftp.ini,
/etc/php/7.0/cli/conf.d/20-gd.ini,
/etc/php/7.0/cli/conf.d/20-gettext.ini,
/etc/php/7.0/cli/conf.d/20-iconv.ini,
/etc/php/7.0/cli/conf.d/20-json.ini,
/etc/php/7.0/cli/conf.d/20-mbstring.ini,
/etc/php/7.0/cli/conf.d/20-mcrypt.ini,
/etc/php/7.0/cli/conf.d/20-mysqli.ini,
/etc/php/7.0/cli/conf.d/20-pdo_mysql.ini,
/etc/php/7.0/cli/conf.d/20-phar.ini,
/etc/php/7.0/cli/conf.d/20-posix.ini,
/etc/php/7.0/cli/conf.d/20-readline.ini,
/etc/php/7.0/cli/conf.d/20-shmop.ini,
/etc/php/7.0/cli/conf.d/20-simplexml.ini,
/etc/php/7.0/cli/conf.d/20-sockets.ini,
/etc/php/7.0/cli/conf.d/20-sysvmsg.ini,
/etc/php/7.0/cli/conf.d/20-sysvsem.ini,
/etc/php/7.0/cli/conf.d/20-sysvshm.ini,
/etc/php/7.0/cli/conf.d/20-tokenizer.ini,
/etc/php/7.0/cli/conf.d/20-wddx.ini,
/etc/php/7.0/cli/conf.d/20-xmlreader.ini,
/etc/php/7.0/cli/conf.d/20-xmlwriter.ini,
/etc/php/7.0/cli/conf.d/20-xsl.ini,
/etc/php/7.0/cli/conf.d/20-zip.ini
root@server:/home/server# php -v
PHP 7.0.13-1+deb.sury.org~xenial+1 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.13-1+deb.sury.org~xenial+1, Copyright (c) 1999-2016, by Zend Technologies
You have new mail in /var/mail/root
编译到我的PHP二进制文件中的扩展名：
root@server:/home/server# php -m
[PHP Modules]
calendar
Core
ctype
curl
date
dom
exif
fileinfo
filter
ftp
gd
gettext
hash
iconv
json
libxml
mbstring
mcrypt
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
Phar
posix
readline
Reflection
session
shmop
SimpleXML
sockets
SPL
standard
sysvmsg
sysvsem
sysvshm
tokenizer
wddx
xml
xmlreader
xmlwriter
xsl
Zend OPcache
zip
zlib
[Zend Modules]
Zend OPcache
我几乎可以肯定，这个问题不是预先运行不止一次＆＃34; - 它能是什么？