使用PHP读取资料
使用PHP读取文件
PHP的IO操作比起java来说简单的不是一点点,同样的读取文件java的处理比较繁琐,php基本上就是几句代码就出来了。从这些地方来说php真的是比较方便,这次分享的是php文件操作的读取几种文件的方法
1.读取普通文件主要就是文本文件的读取方法
读取txt文本文件php给我们提供了比较常用的两种方法,还是先从简单的说起代码如下
<?php $path="usephp.txt"; //判断文件是否存在 if(file_exists($path)){ $str=file_get_contents($path); echo $str; }else{ die("文件不存在"); } ?>
这种方法用于读取比较小的文件效果最好,如果读取大文件可能对apache造成很大的冲击,因为文件是一整个直接被读取出来。所以使用下面这种可能比较好
<?php $path="usephp.txt"; /*判断文件是否存在*/ if(file_exists($path)){ $fp=fopen($path,"r"); $str=""; //设置缓冲区的大小为1024个字节 $buf=1024; //用于验证读取文件的安全性(可选) $tem=0; while(!feof($fp)&&$buf-$tem>0){ $str.=fread($fp,$buf); $tem+=$buf; } echo $str; }else{ die("文件不存在"); } fclose($fp); ?>
2.读取资源文件或者配置文件
对于资源文件或者配置文件,php也为我们提供了对于的方法,个人觉得php读这种文件的方法很好使,来简单看下我的资源文件
下面把读取资源文件的代码贴出来
<?php $path="pool.properties"; //判断文件是否存在 if(file_exists($path)){ $str=parse_ini_file($path); foreach ($str as $key => $value ) { echo "$key : $value".""; } }else{ die("文件不存在"); } ?>
下面是程序运行效果图
是不是比java操作文件要简单呢?

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

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

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

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

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

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

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,

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

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

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 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.
