How to modify the default time zone in php: first open the php configuration file and search for date.timezone; then cancel the comment before date.timezone; finally fill in the corresponding time zone identifier and restart the server.
The operating environment of this article: windows10 system, php 5.0, thinkpad t480 computer.
First we need to make the following settings in the configuration file:
The PHP configuration file is the php.ini file in the PHP installation directory. Find and open it. Then search for date.timezone in the file, we will see a piece of information as shown below:
[Date] ; Defines the default timezone used by the date functions ; http://php.net/date.timezone ;date.timezone =
where; date.timezone = the previous; has the same function as // in PHP, both The meaning of the comment, here we need to remove this; and fill in the corresponding time zone identifier after = in this sentence, as shown below:
[Date] ; Defines the default timezone used by the date functions ; http://php.net/date.timezone date.timezone = Asia/Shangha
There are many time zone identifiers, and some commonly used time zones are listed below Identifiers and their meanings:
Asia/Shanghai - Shanghai
Asia/Chongqing - Chongqing
Asia/Urumqi —— Urumqi
Asia/Hong_Kong —— Hong Kong
Asia/Macao ——Macao
Asia/Taipei - Taipei
Asia/Singapore - Singapore
PRC - China Time Zone
Tip: If you are in China, we can set the time zone to "Asia/Shanghai or PRC". After the setting is successful, remember to restart the server!
Free learning video sharing: php tutorial
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在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。


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