search
Homephp教程php手册php通过function_exists检测函数是否存在的方法

这篇文章主要介绍了php通过function_exists检测函数是否存在的方法,实例分析了php使用function_exists检测函数是否存在及调用的相关技巧,非常具有实用价值,需要

本文实例讲述了php通过function_exists检测函数是否存在的方法。分享给大家供大家参考。具体分析如下:

php中可以通过function_exists()函数检测另外一个函数是否存在,可以把函数名作为一个字符串传入function_exists,判断该还是是否存在

function highlight( $txt ) { return "$txt"; } function textWrap( $tag, $txt, $func="" ) { if (function_exists( $func ) ) $txt = $func($txt); return "$txt$tag>\n"; }

用法示例如下:

echo textWrap('i','function exists Demo','highlight'); //输出结果为斜体字的: function exists Demo

希望本文所述对大家的php程序设计有所帮助。

Statement
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

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)