stat(), lstat(), file_exists(), is_writable(), is_readable(), is_executable(), is_file(), is_dir(), is_link(), filectime(), fileatime(), filemtime() , fileinode(), filegroup(), fileowner(), filesize(), filetype(), fileperms() Solution: Before using these functions, use clearstatcache () to clear the impact of the cache http://www.bkjia.com/PHPjc/319689.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/319689.htmlTechArticlestat(), lstat(), file_exists(), is_writab
1. Recommended articles about the php fileinode() function
Introduction: stat(), lstat(), file_exists(), is_writable(), is_readable(), is_executable(), is_file(), is_dir(), is_link(), filectime(), fileatime(), filemtime(), fileinode( ), filegroup(), fileowner(), filesize(), filetype(), fi...
2. 10 recommended articles about php filectime
Introduction: System files: In development, we sometimes need to know the last access time of a file and the last modified time of the file. , introduce the three functions provided by PHP to determine the access, creation and last modification time of files: fileatime(), filectime() and filemtime(). 1. fileatime()int fileatime(string filename): The fileatime() function returns the last access time of filename. The last access here refers to whenever a file...
3 . 10 recommended articles about the php fileatime() function
Introduction: System files: In development, we sometimes need to know the last access time of a file and the last modification time of a file. Let's introduce the three functions provided by PHP to determine the access, creation and last modification time of a file: fileatime(), filectime() and filemtime() . 1. fileatime()int fileatime(string filename): The fileatime() function returns the time when filename was last accessed. The last access here refers to the number of times a file is accessed...
4. php method to get file creation time and modification time
Introduction: filemtime( string filename ) Returns the time when the file was last modified, or FALSE if an error occurs. The time is returned as a Unix timestamp, which can be used with date(). For example: $a=filemtime("log.txt");
5. windows - Questions about content changes in the PHP monitoring folder
Introduction: I want to monitor the filemtime of a folder every 5 seconds, and then realize its function by comparing the similarities and differences of the two filemtimes. $filetime1 = filemtime("PATH.txt");sleep(10);$filetime2 = filemtime("Path.txt"), but in the end, 2 filemtimes were obtained...
Introduction:: This article mainly introduces the modification of yii2 assets. Students who are interested in PHP tutorials can refer to it.
7. View file modification time with PHP
Introduction::This article mainly introduces PHP to view file modification time Time, students who are interested in PHP tutorials can refer to it.
8. Simple breakfast recipes and practices Simple PHP cache design implementation code
Introduction: A complete collection of simple breakfast recipes and their practices: A complete collection of simple breakfast recipes and their practices Simple PHP cache design implementation code: Copy the code The code is as follows:
9. About the weird 6-hour time difference issue in the Php timestamp during development
Introduction:: About the weird 6-hour time difference problem in the Php timestamp during development: Recently, I used the Php crawler to develop a Jian3 818 and tree hole reading website. I used filemtime to obtain the last part of the file. I found an extremely weird problem when modifying the time. For example, I modified the file at 2016-7-3 10:00:00, but using filemtime to get the time, it was 2016-7-3 4:00:00. Why is it so weird that there are 6 hours? time difference? = = After checking, I found out that it is a time zone problem. You can change it in the configuration file, or you can add date_default
#10 at the beginning of the php file. php file status cache Problems caused_PHP Tutorial
#Introduction: Problems caused by php file status caching. stat(), lstat(), file_exists(), is_writable(), is_readable(), is_executable(), is_file(), is_dir(), is_link(), filectime(), fileatime(), filemtime(), fileinode( ), fileg
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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。

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。

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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