


Command: file_put_contents();
Command analysis: file_put_contents (PHP 5)
file_put_contents -- Write a string to a file
Instructions:
int file_put_contents ( string filename, string data [, int flags [, resource context]] )
has the same function as calling fopen(), fwrite() and fclose() in sequence.
The data parameter can be an array (but not a multi-dimensional array), which is equivalent to file_put_contents($filename, join('', $array))
Since PHP 5.1.0, the data parameter can also be specified For stream resources, the cache data saved in the stream will be written to the specified file. This usage is similar to using the stream_copy_to_stream() function.
Parameters
filename
The name of the file to which data will be written.
data
Data to be written. The type can be string, array or stream resource (as mentioned above).
flags
flags can be FILE_USE_INCLUDE_PATH, FILE_APPEND and/or LOCK_EX (to obtain an exclusive lock), however use FILE_USE_INCLUDE_PATH with extreme caution.
context
A context resource.
Write the code (the code itself is correct, but it learned another function by mistake):
$contents = "This is the content written using file_put_contents";
$contents2 = array("This is written using the ","file_put_contents"," command
file_put_contents("html/caceh.txt",$contents);
file_put_contents("html/cache2.txt",$contents2);
?>
Code analysis: Plan to use the file_put_contents command to write strings to the two files cache.txt and cache2.txt.
Result: The caceh.txt file was added in the html file directory, you understand————
Remember: the file_put_contents() function integrates fopen(), fwrite(), and fclose() A function. In this example, the newly created file is the function of fopen().

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。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Atom editor mac version download
The most popular open source editor

Dreamweaver Mac version
Visual web development tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 English version
Recommended: Win version, supports code prompts!
