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Database operation class

PHP library used by csv-masterCSV data

Database operation class

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csv-masterCSV data using PHP library

<?php
require __DIR__.'/src/functions_include.php';
spl_autoload_register(function ($class) {
    $prefix = 'League\Csv\';
    if (0 !== strpos($class, $prefix)) {
        return;
    }
    $file = __DIR__.'/src/'.str_replace('\', '/', substr($class, strlen($prefix))).'.php';
    if (!is_readable($file)) {
        return;
    }
    require $file;
});

Comma-Separated Values ??(CSV, sometimes also called character-separated values, because the separator character may not be a comma), its file stores tabular data (numbers and text) in plain text. Plain text means that the file is a sequence of characters and contains no data that must be interpreted like a binary number. A CSV file consists of any number of records, separated by some kind of newline character; each record consists of fields, and the separators between fields are other characters or strings, most commonly commas or tabs. Typically, all records have exactly the same sequence of fields. Usually these are plain text files. It is recommended to use WORDPAD or Notepad (NOTE) to open it, and then save a new file first and then open it with EXCEL, which is also one of the methods. A universal standard for the CSV file format does not exist, but there is a basic description in RFC 4180. The character encoding used is also not specified, but 7-bit ASCII is the most basic universal encoding.

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Working with Databases in WordPress

15 Feb 2025

WordPress database interaction guide: mastering wpdb class and database operation skills WordPress comes with a large number of database interaction functions. WP_Query class and wp_insert_post, update_post_meta, get_posts and other functions are usually enough to deal with most situations. However, especially when dealing with custom tables, we sometimes need to do things that cannot be achieved by WordPress native features. This tutorial will explore the most important class in WordPress database interaction - wpdb, and share some development tips. We will introduce the dbDelta function used to create custom tables, but will not cover creating initial Word