PHP multiple threads reading, writing a file at the same time
JSON A lightweight data interchange format. It is based on a subset of ECMAScript. JSON uses a text format that is completely language-independent but also uses conventions similar to the C language family (including C, C+... Read What are the characteristics of json format data?
$fp = fopen("/tmp/lock.txt","w+");
if (flock($fp , LOCK_EX)) { // Exclusive lock
fwrite($fp , "Write something here\n");
flock($fp , LOCK_UN); // release lock
} else {
echo "Couldn't lock the file!" ;
}
fclose($fp);Continuing...
- Summarize PHP interview questions
- What does HTTP header keep-alive mean?
- What are common PHP array functions?
- The difference of echo, print(), print_r(), sprintf(), var_dump() in PHP
- PHP - Swap The Values of 2 Variables Without Temp Variable
- What is PHP heredoc used for?
- PHP multiple threads reading, writing a file at the same time
- PHP session usage instead of a cookie, make session expiration and the corresponding function
- What are the characteristics of json format data?
- PHP function to obtain the content of the file and the corresponding
- PHP Magic Methods And Magic Constants
- PHP get the IP address of the client
- List all the files and folders in a Directory with PHP
- PHP maintain the file log
- PHP Caching Techniques
- PHP difference between Strlen() and Mb_strlen() in Chinese language
- PHP get extension from a URL
- PHP turns off safe_mode and functions, parameters are affected?
- PHP difference between isset(), empty() and is_null
- PHP find the relative path of 2 files
- Advantages & Disadvantages of MVC Model
- PHP Session and Cookie (operating mechanism)
- PHP Regular expressions for Chinese characters
- PHP Get The Header Information
- PHP Interview: MySQL section
- Linux: what is the core file and what is its use?
- Linux: In addition to file mapping, is there any other way to share memory?
- Linux: Explain the purpose of the following 10 shell commands
- What is the attributes of Linux files?
- Explain find command in Linux
- Advantages and Disadvantages of Apache and NGINX server
- The difference between CGI and FastCGI
- Linux Select, Poll and Epoll difference
- The difference between Memcached and Redis
Pass the value through the url, and attach the session id to the url (disadvantage: there cannot be pure static pages in the entire site, because the session id of pure static pages will not continue to be passed to the ne...
Heredoc is generally not described in detail in formal PHP documentation and technical books. It is a Perl-style string output technique. Using heredoc technology can realize the quasi-separation of interface and code, suc...