Table of Contents
回复内容:
Home Backend Development PHP Tutorial Can I use custom functions directly?

Can I use custom functions directly?

Sep 08, 2016 am 08:43 AM
php

<br>function myfun(a,b){

<code>return a+b;
}</code>
Copy after login
Copy after login

<code>
这个简单的自定义函数,可否不通过require的方法,将它变成一个系统内部函数?
也就是我进入php -a 后,可以直接输入 echo myfun(3,4);
python可以把自定义函数放在一个专门放置系统函数的文件夹内,
这个自定义函数就和语言本身的内置函数一样使用了, php可否做到?

@brook我这么做了
vim   /etc/php5/apache2/php.ini
auto_prehend_file=/tmp/myFun.php
vim  /etc/php5/cli/php.ini
auto_prehend_file=/tmp/myFun.php

php -a 可以导入它,但是我正式引用它的时候,报错
php -a</code>
Copy after login
Copy after login

Interactive mode enabled
function myFun(x,y){

<code>return x+y;</code>
Copy after login
Copy after login

}
php > echo myFun(3,5);
PHP Fatal error: Call to undefined function myFun() in php shell code on line 1

回复内容:

<br>function myfun(a,b){

<code>return a+b;
}</code>
Copy after login
Copy after login

<code>
这个简单的自定义函数,可否不通过require的方法,将它变成一个系统内部函数?
也就是我进入php -a 后,可以直接输入 echo myfun(3,4);
python可以把自定义函数放在一个专门放置系统函数的文件夹内,
这个自定义函数就和语言本身的内置函数一样使用了, php可否做到?

@brook我这么做了
vim   /etc/php5/apache2/php.ini
auto_prehend_file=/tmp/myFun.php
vim  /etc/php5/cli/php.ini
auto_prehend_file=/tmp/myFun.php

php -a 可以导入它,但是我正式引用它的时候,报错
php -a</code>
Copy after login
Copy after login

Interactive mode enabled
function myFun(x,y){

<code>return x+y;</code>
Copy after login
Copy after login

}
php > echo myFun(3,5);
PHP Fatal error: Call to undefined function myFun() in php shell code on line 1

Add auto_prepend_file = /path/to/you/myFun.php to your php.ini file;

PS: php -a 和网页里用的不同的 php.ini,在网页里输出 phpinfo()查看正在使用的是 php.ini 路径,添加上面的一句就行了

当然可以啦。你创建一个公共php文件,里面定义n个方法,引用好之后,掉用任意一个都可以这么写的。你可以参考tp框架里面有个common.php或者function.php方法文件。就是这么用的

  1. 专门准备一个php文件全部放这样的全局函数,

  2. 框架文件的头部 require_once 这个全局函数文件(比较灵活,且只对当前项目影响),

  3. 楼上的做法也是可以的,但除非你是一些方法每个项目都需要, 否则不推荐,并且这个文件也不建议放在项目文件夹下.

两个错误
vim /etc/php5/cli/php.ini
auto_prepend_file=/tmp/myFun.php

vim /tmp/myFun.php
function myfun($a,$b){
return $a+$b;
}

mgajnpwmdgw

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

7 PHP Functions I Regret I Didn't Know Before 7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

See all articles