php中in_array函数用法分析,phpin_array
本文实例分析了php中in_array函数用法。分享给大家供大家参考。具体如下:
PHP是弱类型语言 在使用IN_ARRAY函数时尽量带上第三个参数,代码如下:
复制代码 代码如下:
var_dump(in_array(0,array('s','sss'),true)); // return false
var_dump(in_array(0,array('s','sss'))); // return true
var_dump(in_array(0,array(1,2,3))); // return false
从上面的三个函数可以看出来当,第一个:in_array(0,array('s','sss'),true),返回是我们想要的值.
使用:
复制代码 代码如下:
var_dump(in_array(0,array('s','sss')));
与:复制代码 代码如下:
var_dump(in_array(0,array(1,2,3)));
返回ture明显不是我们要的值了,因为主要是PHP为弱类型所以以前各位还是注意一些比较好了.
希望本文所述对大家的php程序设计有所帮助。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Linux new version
SublimeText3 Linux latest version

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SublimeText3 Chinese version
Chinese version, very easy to use

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.