This article mainly introduces you to php processing static pages: page setting cache time examples. The editor thinks it is quite good. Now I will share it with you and give you a reference. Let’s follow the editor to take a look, I hope it can help everyone.
Q: How to trigger the system to generate a purely static page?
1. Add cache time to the page
2. Manual triggering method
3.crontab scheduled scanner
Let’s implement option one: add cache time to the page
User request page => Whether the page has expired=> => No (get a static page) || = >Yes (the dynamic page generates a new static page)
if( 如果存在这个静态文件 && 没有过期){ // 获取页面 }else{ // 重新生成一份静态页面 }
ok, the basic logic is like this, let’s improve the code below:
<?php if(is_file('./index.html') && (time()-filemtime('./index.html')) < 60){ // 假设缓存时间是60秒 // 获取页面 require_once('./index.html'); }else{ // 重新生成一份静态页面 // 准备要展示到网页的数据 $data = array( array('id'=>1,'msg'=>'hello java'), array('id'=>2,'msg'=>'hello php'), array('id'=>3,'msg'=>'hello python'), ); // 渲染到模板 // 实际项目一般是在html里渲染 // 这里演示 希望能看懂 ob_start(); // 开始输入缓冲控制 foreach($data as $item){ echo $item['id'].'===>'.$item['msg'].'<br/>'; } // 开始生成静态页面文件 file_put_contents('index.html',ob_get_contents()); }
In this way, when we access index.php, if the static file cache has not expired, the actual accessed content comes from the static file index.html.
Related recommendations:
How to set static content cache time in php, php setting static cache_PHP 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。

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。

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。

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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