10 recommended courses about the php echo() function

假设有一个数组：请问上面的代码会输出什么？上面的结果大家可以再本地试一试。我们一般使用print_r来打印数组（当然用var_dump也可以，但是结构上不清晰）bool print_r ( mixed $expression [, bool $return ] )请尝试打印print_r($names);当第二个参数为true时，print_r不会直接打印数组，而是将打印的内容作为字符串返回echo print_r($names, true);我们可以使用echo去打印一个字符串、整型、浮点型，但是我们不能用它来

1. 关于打印数组的10种方法详解

简介：假设有一个数组：<?php$arr=["PHP","中文","网"];echo $arr;?>请问上面的代码会输出什么？上面的结果大家可以再本地试一试。我们一般使用print_r来打印数组（当然用var_dump也可以，但是结构上不清晰）bool print_r ( mixe...

2. 有关php sprintf()函数的文章推荐10篇

简介：本文给大家汇总介绍了7种php常用的打印输出函数，分别是echo，print，printf，sprintf，print_r，var_dump，die，希望对大家学习php能够有所帮助本篇文章一直来学习PHP中所有用于输出信息的函数，分类比较来学习其相同点与不同点，掌握日常开发中必备的技巧。开发就一定需要调试代码，而PHP调试代码不能像iOS那种编译器语言可以通过Xcode这样的开发软件来单步调试，...

3. 有关php substr()函数的文章推荐10篇

简介：本文实例讲述了PHP中字符串长度的截取用法。分享给大家供大家参考，具体如下：php中提供了很多使用函数，其中字符串的截取函数也不例外，而且功能也非常强大。<?php//文件编码格式为UTF-8$str='在公园船上,有一个漂亮的女孩，如果在湖中央发生点什么……';echo mb_substr($str,0,7,'UTF-8');//这里设...

4. 关于substr函数的详细介绍

简介：本文实例讲述了PHP中字符串长度的截取用法。分享给大家供大家参考，具体如下：php中提供了很多使用函数，其中字符串的截取函数也不例外，而且功能也非常强大。<?php//文件编码格式为UTF-8$str='在公园船上,有一个漂亮的女孩，如果在湖中央发生点什么……';echo mb_substr($str,0,7,'UTF-8');//这里设...

5. linux中关于echo命令的用法实例教程

简介：linux的echo命令, 在shell编程中极为常用, 在终端下打印变量value的时候也是常常用到的, 因此有必要了解下echo的用法，下面这篇文章主要给大家介绍了关于linux中echo命令用法的相关资料，需要的朋友可以参考学习。

6. php函数的种类与调用方法大揭密

Introduction: In PHP, the use of functions is still very flexible, but no matter what, functions, in the final analysis, are still a process. At the same time, there must be a return value so that users can perceive its existence and its value! Therefore, a function is always used as a value. Therefore, it cannot appear on the left side of the equal sign '='. This is the biggest difference between functions and language structures. For example, we often say: echo() and list() are a language structure, not a function, even though they look like functions, because they can be placed on the left side of the equal sign and can accept assignment. But functions don't work. I hope this article will give you a deeper understanding of functions~~

7. Detailed explanation of magic method___toString() examples (php advanced object-oriented tutorial)

Introduction: We all know that after we instantiate a class, when accessing the properties of the class, it is $ To access it in the format of instantiation name->attribute name, have you directly used echo or print to output the object. Some people say that this should not work, and an error will be reported. Yes, such direct output will indeed report an error, but when we use the magic method __toString, it will be fine. Example analysis:

##8. PHP output array-printing array example detailed explanation

Introduction: Outputting array elements in PHP can be achieved through output statements, such as echo statements, print statements, etc. However, this output method can only output a certain element in the array, while the array structure can be output through the print_r() function.

9. Parsing PHP data type objects (Object)

Introduction: Object initialization requires creating a new object object. Use the new statement to instantiate a class:

Detailed introduction to the summary of PHP print output functions

##Introduction: This article introduces 7 types to you Commonly used print output functions in PHP are echo, print, printf, sprintf, print_r, var_dump, and die. I hope it will be helpful to everyone learning PHP

[Related Q&A recommendations]:

php - How to paginate typecho archive pages

linux - crontab cannot automatically execute scripts

linux - How to simplify the processing of path replacement

mysql - The maximum number of database connections is 10. Can typecho run?

java - Shell script running problem

The above is the detailed content of 10 recommended courses about the php echo() function. For more information, please follow other related articles on the PHP Chinese website!