How to find PHP function documentation online

Methods to find PHP function documentation online: 1. The official PHP documentation website provides comprehensive function documentation; 2. Third-party websites, such as PHP.net manual scrambler, PHP function generator and Packagist PHP document generator, can Provides additional search and discovery capabilities; 3. Learn about function usage and parameters through official documentation, comments, and code examples.

How to find PHP function documentation online

PHP function documentation is an essential resource for learning and mastering the PHP language. They provide a detailed description of the function and its purpose, including parameters, return values, and other important information.

Official PHP Documentation

The PHP official documentation website (https://www.php.net/docs/) is the most comprehensive resource, including all PHP functions document. You can browse functions alphabetically or by category.

// 例如，要查找有关 file_exists() 函数的文档：
https://www.php.net/docs/manual/function.file-exists.php

Third-party documentation website

While the official documentation is very comprehensive, there are other third-party websites that can help you find function documentation more easily:

• PHP.net Manual Scrambler: You can search by function name, parameters or return value.
  https://www.php.net/manual/zh/indexes.functions.php
• PHP Function Generator: Find similar functions or find functions by category.
  https://phpfunc.org/
• Packagist PHP documentation generator: For functions in the Composer package.
  https://getcomposer.org/doc/03-cli.md#generate-php-function-documentation

Practical case

Assumption You want to use the file_exists() function to check if a file exists:

// 官方文档：https://www.php.net/docs/manual/function.file-exists.php

<?php
// 检查文件是否存在
if (file_exists('myfile.txt')) {
    echo '文件存在！';
} else {
    echo '文件不存在。';
}
?>

Tip

• Use the search bar or index page to find a specific function.
• Use comments and code examples to learn how to use the function.
• Browse categories or view the alphabetical list of functions to discover new functions.
• If you can't find the documentation you need, try asking for help in the forum or community.

The above is the detailed content of How to find PHP function documentation online. For more information, please follow other related articles on the PHP Chinese website!