方法1: (最好的方法)在php.ini里加上找到date.timezone项,设置date.timezone = "Asia/Shanghai",重启环境就ok了. 方法2: 在需要用到这些时间函数的时候,在页面添加date_default_timezone_set("PRC"); 方法3: 在页头加上设置时区ini_set('date.timezone','Asia/Shanghai'); 总结,方法一和方法三一般要有服务器权限的才比较有效,而方法2技术人员就可

当运行程序时,会出现如下警告: Warning: strftime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still ge

打印new Date(),Fri Aug 12 13:37:51 CST 2016. 显示Asia/Shanghai的时区,但是date toString 的时区简写却是CST.更坑爹的是,Google CST结果出来是Central Standard Time. 表示North American Central Standard Time. 还以为jdk的date类有问题,debug date toString发现确实是将Asia/Shanghai的name 简写成CST. 接着google,

使用 Smarty 的时候出现这种警告: Warning: strftime(): It is not safe to rely on the system's timezone settings. 解决办法: 设置时区 方法1: (最好的方法)在php.ini里加上找到date.timezone项,设置date.timezone = "Asia/Shanghai",重启环境就ok了. 方法2: 在需要用到这些时间函数的时候,在页面添加date_default_timezone_set

之前一直转windows平台下做php,很少遇到问题.现在有了macbook,还在慢慢的熟悉中,搭建php开发环境,熟悉mac系统文档组织还有命令,颇费功夫. 今天我在mac下做一个php的练习,用到了date方法,但是提示有错. 提示信息如下:“It is not safe to rely on the system's timezone settings.” 搜索了一下,解决方法如下: 在mac下,打开你的终端,输入命令:"sudo cp /etc/php.ini.default /ect/

Method 1 #tzselect # select timezone e.g. Asia/Shanghai#echo 'Asia/Shanghai' > /etc/timezone # set timezone#apt-get install ntpdate # install ntpdate package to synchronize date time#echo "server 3.cn.pool.ntp.org>server 3.asia.pool.ntp.org>

Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) ADDITIONAL PRACTICE FOR THE FINAL PROBLEM 1 A box contains 8 dark chocolates, 8 milk chocolates, and 8 white chocolates. (It’s amazing how t

Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Zeros and Ones: Sum of a sample with replacement $S$ is the number of successes: $n$ independent trials, chance of success on a sing

Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Standard Error The standard error of a random variable $X$ is defined by $$SE(X)=\sqrt{E((X-E(X))^2)}$$ $SE$ measures the rough size

Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Law of Large Numbers As the number of trials increases, the chance that the proportion of successes is in the range $$p\pm\text{a fi

Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) PRACTICE PROBLEMS FOR THE MIDTERM PROBLEM 1 In a group of 5 high school students, 2 are in 9th grade, 2 are in 10th grade, and 1 is in 12th

Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Independent $$P(A\cap B)=P(A)\cdot P(B)$$ Binomial Distribution $$C_{n}^{k}\cdot p^k\cdot(1-p)^{n-k}$$ R function: dbinom(k, n, p) U

Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Bayes Theorem $$P(A_i|B)=\frac{P(B|A_i)\cdot P(A_i)}{\sum_{j}P(B|A_j)\cdot P(A_j)}$$ where $$P(B)=\sum_{j}P(B|A_j)\cdot P(A_j)$$ GRA

Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) ADDITIONAL PRACTICE FOR THE FINAL In the following problems you will be asked to choose one of the four options (A)-(D). The options are sta

Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Chi-square test Random sample or not / Good or bad $$H_0: \text{Good model}$$ $$H_A: \text{Not good model}$$ Based on the expected p

Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Dependent Variables (paired samples) SD of the difference is $$\sqrt{\sigma_x^2+\sigma_y^2-2\cdot r\cdot\sigma_x\cdot\sigma_y}$$ whe

Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary One-sample $t$ test Test for a population mean (unknown SD); sample size $n$. That is, known sample mean and SD but unknown populati

Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Test of Hypotheses $$\text{Null}: H_0$$ $$\text{Alternative}: H_A$$ Assuming the null is true, the chance of getting data like the d

Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Estimating population means and percents Sampling assumptions: Simple Random Sample (SRS) Large enough so that the probability histo

在用PHP5.3以上的PHP版本时,只要是涉及时间的会报一个 Warning: phpinfo() [function.phpinfo]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of t

PHP调试的时候出现了警告: It is not safe to rely on the system解决方法,其实就是时区设置不正确造成的,本文提供了3种方法来解决这个问题. 实 际上,从PHP 5.1.0开始当对使用date()等函数时,如果timezone设置不正确,在每一次调用时间函数时,都会产生E_NOTICE 或者 E_WARNING 信息,而又在php中,date.timezone这个选项,默认情况下是关闭的,无论用什么php命令都是格林威治标准时间,但是PHP5.3中如果没 有设