1. PHP environment construction
2. Java running environment construction. It needs to be explained here that the selenium running file is a jar package. You must set up the java running environment. environment to enable selenium.
3. Download the selenium file and download the jar package file of selenium-server-standalone-3.4.0.jar.
4. Install a browser. It is recommended that you use Google or Firefox browser. Please note that you need to configure environment variables for the browser. Otherwise, the browser cannot be launched later.
5. Download the browser driver file (note here: be sure to download the driver file that matches the browser version installed on this machine). The driver file name used by Google browser is: chromedriver. The driver file name of Firefox is: geckodriver.exe (go to selenium official website to download, select java).
Note: The downloaded driver file must be placed in the root directory of php
6. Download the demo file of PHP selenium
7. After writing the demo, you can test it. First, run the downloaded selenium jar package file, and enter the directory where you placed the selenium file in the cmd command line. Then execute the following command
(Note: You need to configure the java running environment variable in the second step)
java -jar selenium-server-standalone-3.4.0.jar
If the following prompt appears on your command line, that is The startup was successful.
8. You can run your demo.php file in the cmd command line. If you successfully launch the browser, congratulations. For how to operate the browser, how to log in, how to obtain cookie information, etc., please directly refer to the PHP selenium documentation.
Finally, I would like to remind everyone to pay attention to a few points (also some of the problems I encountered in the deployment environment):
(1) Version problem: Be sure to download browser plug-ins and selenium Choose the right version
(2) Problem with the location of the browser plug-in: I encountered this problem when I was doing it, and then I threw it directly into the php directory and solved it
(3) In When logging in specifically, php throws an exception, which means that the button to be clicked is not found on the page being operated (I choose to locate the element by id here). Even if I change it to locate it by name, it cannot be located. I am surprised. Strange, I flipped through the document decisively and saw the tips in the document that if you use , you must switch to the specified iframe to locate the element.
Recommended tutorial: PHP video tutorial
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php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

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。

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。


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