What is a php lock file? Summarize the usage of locked file examples

Advanced application of PHP file processing - file pointer PHP can realize the positioning and query of file pointers, thereby realizing fast query of required information. The file pointer functions include rewind(), fseek(), feof() and ftell() function. In the previous article "Advanced Application of PHP File Processing—Remote File Access and Locking Files" we introduced remote access to files and how to lock files. Friends who haven't read it can go and take a look. I won't cover it here. Enough talk, today we mainly talk about the functions in the file pointer! 1: rewind() function This function sets the pointer of the file handle to the beginning of the file stream. The syntax format of this function is as follows: bool rewind (resource $handle) Note: If the file is opened in append ("a") mode, then Any data written to a file will always be appended to the end of the existing contents of the file, regardless of the position of the file pointer! 2: fseek() function The fseek() function realizes the positioning of the file pointer. The syntax format of this function is as follows:

1. 10 recommended articles about the php ftell() function

Introduction: An advanced application of PHP file processing - file pointer PHP can realize the positioning and query of file pointers, thereby achieving For quick query of required information, the file pointer functions include rewind(), fseek(), feof() and ftell() functions. In the previous article "Advanced Application of PHP File Processing—Remote File Access and Locking Files" we introduced remote access to files and how to lock files. Friends who haven't read it can go and take a look. I won't cover it here. Enough talk, today we mainly talk about the functions in the file pointer! 1: rewind(...

2. 10 recommended articles about the php fseek() function

Introduction: An advanced application of PHP file processing - file pointer PHP can realize the positioning and query of file pointers, thereby realizing fast query of required information. The file pointer function has rewind (), fseek(), feof() and ftell() functions. In the previous article "Advanced Applications of PHP File Processing - Remote File Access and Locking Files" we introduced remote access to files and how to lock files. , friends who haven’t seen it, you can go and take a look, I won’t go into details here, today we mainly talk about the functions in the file pointer! 1: rewind(...

##3 . 10 recommended articles about the php feof() function

##Introduction: PHP file processing The advanced application of file pointer PHP can realize the positioning and query of the file pointer, thereby realizing the fast query of the required information. The file pointer functions include rewind(), fseek(), feof() and ftell() functions in the previous article. In the article "Advanced Applications of PHP File Processing—Remote File Access and Locking Files", we introduced remote access to files and how to lock files. Friends who haven't read it can go and take a look. I won't go into details here. Today we mainly talk about the functions in the file pointer! 1: rewind(...

##4.

Advanced application of PHP file processing - remote file access and locking files

Introduction: In PHP, in addition to basic read and write operations on files, you can also read and write file pointers Search, locate, and lock the file being read, etc.

##5. php flock function example_PHP tutorial

Introduction: PHP flock function example. Since flock() requires a file pointer, you may have to use a special lock file to protect access to files intended to be opened in write mode (add w in the fopen() function Or

6. PHP4 User Manual: Function-flock_PHP Tutorial

Introduction: PHP4 User Manual: Function-flock. flock (PHP 3>= 3.0.7, PHP 4 >= 4.0.0)flock -- lock file description bool flock (int fp, int operation [, int wouldblock]) PHP supports complete file locking when accessing the file ( This means that all

8. PHP About files and directories (1) Writing files File permissions 3. Locking files_PHP tutorial

Introduction: PHP About Files and Directories (1) Writing Files File Permissions 3. Locking Files. PHP About Files and Directories (1) Writing Files File Permissions 3. Locking Files 1. File Permissions In short, everything is It is to ensure the security of the directory, which is better than ensuring the security of the files.

#Introduction: "Basic PHP Tutorial" - 4 Files and Directories Learning Summary 1. Writing files: $fp = fopen(filename, mode); mode is the way to open a file, such as 'a+' Indicates reading and writing files. If the file does not exist, it will be created. The new data will be added to the end of the file. fwrite($fp, write content); fclose($fp); 2. Lock the file: guaranteed when multiple users operate on the file at the same time. No conflict [Related Q&A recommendation]:

How to lock a certain part of the file through LockFile using c++, I haven’t found a method to use it. , can you give an example?

The above is the detailed content of What is a php lock file? Summarize the usage of locked file examples. For more information, please follow other related articles on the PHP Chinese website!