Posts - Page 60 (page 60)
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8 min readBollinger Bands are a popular technical analysis tool used by traders for various trading strategies, including scalping. They consist of three lines, with the middle line representing the moving average (typically a 20-day simple moving average) of the security's price. The upper and lower bands are derived from the standard deviation of the price from the moving average.When used for scalping, Bollinger Bands can help traders identify potential short-term price reversals or breakouts.
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4 min readThe Triple Exponential Average (TRIX) is a technical indicator used in the field of technical analysis to identify trends and generate trading signals. It was developed by Jack Hutson in the 1980s and aims to filter out short-term price movements to focus on the long-term trend.TRIX is calculated using a triple smoothing of the underlying price series. It is based on the Exponential Moving Average (EMA) concept, which places greater weightage on recent data points.
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12 min readThe Stochastic Oscillator is a technical analysis tool used to measure momentum and identify overbought and oversold conditions in the market. It compares a security's closing price to its price range over a specified period. The Stochastic Oscillator consists of two lines - %K and %D.%K is the main line and represents the current closing price relative to the range. It oscillates between 0 and 100, and values above 80 are considered overbought, while values below 20 are considered oversold.
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11 min readThe Arms Index, also known as the TRading INdex (TRIN), is a technical indicator used in the stock market to measure the strength of the overall market. It was developed by Richard Arms in 1967 and is used to determine the market's breadth and potential reversals.The calculation of the Arms Index involves dividing two separate values: the Advance-Decline Ratio (ADR) and the Up-Volume-to-Down-Volume Ratio (UVOL/DVOL).
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8 min readDebugging and profiling PHP code is essential for identifying and fixing issues or bottlenecks in your code. Here are some techniques to help you effectively debug and profile your PHP applications:Enable error reporting: Start by enabling error reporting in your PHP configuration. This will help you identify any syntax errors, runtime errors, or warnings that may be occurring in your code. You can enable error reporting by setting error_reporting and display_errors directives in your php.
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9 min readCaching in PHP is an important technique to improve the performance and reduce the load on the server. It involves storing the generated content or data in a temporary storage system, such as memory or disk, to avoid expensive calculations or database queries.In PHP, you can implement caching using various methods. One common approach is to use a key-value storage system like Memcached or Redis. These systems allow you to store and retrieve data using a unique identifier (key).
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6 min readIn PHP, there are several functions and classes available to help you work with dates and times. These functions allow you to manipulate dates, format them, calculate intervals, and much more.Date and Time Functions: time(): Returns the current Unix timestamp. date(format, timestamp): Formats a timestamp into a specific date/time representation. strtotime(time, now): Parses any English textual datetime description into a Unix timestamp.
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7 min readCreating and using RESTful APIs in PHP involves several steps and concepts. Below is an overview of the process:Setting up the Development Environment: Install PHP and a web server (such as Apache) on your machine. Ensure that the necessary PHP extensions (such as PDO and cURL) are enabled. Designing the API: Determine the resources and their endpoints that the API will expose. Plan the HTTP methods (GET, POST, PUT, DELETE) each endpoint will support.
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10 min readIn PHP, password hashing is a crucial aspect of securing user credentials. It involves transforming a plaintext password into a hashed version, which is a one-way process that cannot be reversed. This hashing process helps protect sensitive data in case of a security breach. Here is an explanation of how to implement password hashing in PHP:PHP Password Hashing Functions: PHP offers built-in functions specifically designed for password hashing.
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5 min readIn PHP, you can create and use sessions to store and transfer data between multiple pages or requests. Sessions are a way to keep track of user information, such as login details, preferences, or shopping cart contents, throughout a browsing session.To create and use sessions in PHP, you need to follow a few steps:Start a session: Before you can use sessions, you need to start them at the beginning of each PHP script. This is usually done by calling the session_start() function.
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8 min readWorking with JSON data in PHP involves various operations such as decoding, encoding, accessing values, and manipulating the data. Here are the steps to work with JSON data in PHP:Decoding JSON: To work with JSON data, you first need to decode it into a PHP variable using the json_decode() function. This function converts the JSON string into a PHP object or associative array. Encoding JSON: If you want to convert a PHP variable into a JSON string, you can use the json_encode() function.
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9 min readAJAX stands for Asynchronous JavaScript and XML. It is a technique used for sending and retrieving data from a server without refreshing the entire webpage. Combining AJAX with PHP allows you to create more dynamic and interactive web applications.To use AJAX with PHP, you need to follow these steps:Create an XMLHttpRequest object: In JavaScript, create a new instance of the XMLHttpRequest object. This object is responsible for making requests to the server.