The difference between bootstrap and layui

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

High-frequency trading is one of the most technologically-rich and capital-intensive areas in the virtual currency market. It is a competition about speed, algorithms and cutting-edge technology that ordinary market participants are hard to get involved. Understanding how it works will help us to have a deeper understanding of the complexity and specialization of the current digital asset market. For most people, it is more important to recognize and understand this phenomenon than to try it yourself.

This article aims to resolve the common Cannotredeclarearray_column() function redefinition error in PHP development. This error usually occurs when trying to customize the array_column function, which is already built-in in newer versions of PHP. The article will explain in detail how to safely implement the old version of Polyfill solution through conditional judgment function_exists(), as well as best practices to directly remove redundant custom functions in a modern PHP environment to ensure the robustness and maintainability of the code.

Through its Turing-complete smart contracts, EVM virtual machines and Gas mechanisms, Ethereum has built a programmable blockchain platform beyond Bitcoin, supporting diversified application ecosystems such as DeFi and NFT; its core advantages include a rich DApp ecosystem, strong programmability, active developer community and cross-chain interoperability; it is currently implementing consensus transformation from PoW to PoS through the upgrade of Ethereum 2.0, introducing beacon chains, verifier mechanisms and punishment systems to improve energy efficiency, security and decentralization; in the future, it will rely on sharding technology to realize data sharding and parallel processing, greatly improving throughput; at the same time, Rollup technology has been widely used as a Layer 2 solution, Optimistic Rollup and ZK-Rollu

Table of Contents What is PCE adjustment index? What is core PCE? Why is PCE adjustment index important? How does PCE adjustment index work? Limitations of PCE adjustment index and CPIPCE adjustment index What is the difference between PCE index and CPI index? How PCE Adjustment Index Role in Crypto Markets How PCE Adjustment Index Conclusion Understanding PCE and its Adjustment Index is crucial for policy makers, economists, and crypto investors and airdrop participants who are concerned about inflation. The PCE adjustment index, that is, the chain-weighted personal consumption expenditure price index, is the Fed's most favored inflation measurement tool. This article was written by the Gate content team and will deeply analyze the definition, operating mechanism, comparison with CPI, its limitations, and

There are four main ways to obtain BTC: 1. Register and exchange it with fiat currency or other digital assets through centralized trading platforms such as Binance, OK, Huobi, and Gate.io; 2. Participate in P2P platforms to directly trade with individuals, and pay attention to the credit risks of the counterparty; 3. Provide goods or services to accept BTC as payment; 4. Participate in airdrops, competitions and other platform reward activities to obtain a small amount of BTC. The core difference between BTC and digital currency is: 1. BTC is a type of digital currency, which belongs to a genus relationship; 2. BTC adopts a proof of work (PoW) mechanism, while other digital currencies may use various technologies such as proof of stake (PoS); 3. BTC emphasizes the value storage function of "digital gold", and other digital currencies may focus on payment efficiency or

The core difference between ETH and ETC comes from the hard fork after the DAO incident in 2016. 1. ETH chose to recover losses through hard forks, adhere to the concept of pragmatism, and support blockchain variability to cope with crises; 2. ETC adheres to "code is law" and maintains the immutability of the original chain; 3. ETH has a huge and active developer ecosystem and PoS consensus, with high security and wide application; 4. ETC follows the PoW mechanism, has slow development, a small ecosystem, has encountered 51% attacks, and has weak market influence; 5. Both can be traded on mainstream exchanges such as Binance, Ouyi, Huobi, and Gate.io, among which ETH is the second largest crypto asset in the world, with liquidity and recognition far exceeding ETC.

Blockchain is a distributed and decentralized digital ledger technology. Its core principles include: 1. Distributed ledger ensures that data is stored simultaneously on all nodes; 2. Encryption technology, linking blocks through hash values to ensure that data is not tampered with; 3. Consensus mechanisms, such as PoW or PoS, ensure that transactions are agreed between nodes; 4. Decentralization, eliminating single point of control, enhancing censorship resistance; 5. Smart contracts, protocols for automated execution. Cryptocurrencies are digital assets issued based on blockchain. The operation process is: 1. The user initiates transactions and signs digitally; 2. The transactions are broadcast to the network; 3. The miner or verifier verifies the validity of the transaction; 4. Multiple transactions are packaged into new blocks; 5. Confirm the new zone through consensus mechanism