To view Git commit history, use the gitlog command. 1. The basic usage is gitlog, which can display the submission hash, author, date and submission information; 2. Use gitlog--oneline to obtain a concise view; 3. Filter by author or submission information through --author and --grep; 4. Add -p to view code changes, --stat to view change statistics; 5. Use --graph and --all to view branch history, or use visualization tools such as GitKraken and VSCode.

To delete a Git branch, first make sure it has been merged or no retention is required. Use gitbranch-d to delete the local merged branch. If you need to force delete unmerged branches, use the -D parameter. Remote branch deletion uses the gitpushorigin-deletebranch-name command, and can synchronize other people's local repositories through gitfetch-prune. 1. To delete the local branch, you need to confirm whether it has been merged; 2. To delete the remote branch, you need to use the --delete parameter; 3. After deletion, you should verify whether the branch is successfully removed; 4. Communicate with the team to avoid accidentally deleting shared branches; 5. Clean useless branches regularly to keep the warehouse clean.

To add a subtree to a Git repository, first add the remote repository and get its history, then merge it into a subdirectory using the gitmerge and gitread-tree commands. The steps are as follows: 1. Use the gitremoteadd-f command to add a remote repository; 2. Run gitmerge-srecursive-no-commit to get branch content; 3. Use gitread-tree--prefix= to specify the directory to merge the project as a subtree; 4. Submit changes to complete the addition; 5. When updating, gitfetch first and repeat the merging and steps to submit the update. This method keeps the external project history complete and easy to maintain.

To identify fake altcoins, you need to start from six aspects. 1. Check and verify the background of the materials and project, including white papers, official websites, code open source addresses and team transparency; 2. Observe the online platform and give priority to mainstream exchanges; 3. Beware of high returns and people-pulling modes to avoid fund traps; 4. Analyze the contract code and token mechanism to check whether there are malicious functions; 5. Review community and media operations to identify false popularity; 6. Follow practical anti-fraud suggestions, such as not believing in recommendations or using professional wallets. The above steps can effectively avoid scams and protect asset security.

As a pioneer in the digital world, Bitcoin’s unique code name and underlying technology have always been the focus of people’s attention. Its standard code is BTC, also known as XBT on certain platforms that meet international standards. From a technical point of view, Bitcoin is not a single code style, but a huge and sophisticated open source software project. Its core code is mainly written in C and incorporates cryptography, distributed systems and economics principles, so that anyone can view, review and contribute its code.

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There are three main ways to set environment variables in PHP: 1. Global configuration through php.ini; 2. Passed through a web server (such as SetEnv of Apache or fastcgi_param of Nginx); 3. Use putenv() function in PHP scripts. Among them, php.ini is suitable for global and infrequently changing configurations, web server configuration is suitable for scenarios that need to be isolated, and putenv() is suitable for temporary variables. Persistence policies include configuration files (such as php.ini or web server configuration), .env files are loaded with dotenv library, and dynamic injection of variables in CI/CD processes. Security management sensitive information should be avoided hard-coded, and it is recommended to use.en

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