PHP Learning Notes: Function Declaration_PHP Tutorial
/* Function definition:
* 1. A function is a Named
* 2. Independent code segment
* 3. Function performs a specific task
* 4. And can return a value to the program that calls it
*
* Advantages of functions :
* 1. Improve program reusability
* 2. Improve program maintainability
* 3. Can improve development efficiency
* 4. Improve software reliability
* 5 .Control the complexity of the program
*
* Function declaration
* function function name(){
*
* }
*
* function function name (parameter 1 , parameter 2, parameter...)
* {
* function body
* }
*
* function function name()
* {
* function body;
* return value;
* }
* function function name (parameter list...)
* {
* function body;
* return value
* }
*
* Note:
* 1. The function must be called to be executed. It can be called before or after the declaration
* 2. The function name is the same as the variable, aaa bbb ccc aaaBbbCcc (The first word is lowercase, and the first letter of each subsequent word is capitalized)
* 3. Functions cannot have the same name when declaring them
* 4. You can change the behavior of the function by passing parameters to the function
* Formal parameters : When declaring a function, the declared parameters are variables. Multiple parameters are separated by
* Actual parameters: When calling the function, the formal parameter value (data, which can also be a variable) is passed to
* 5. If If there is no return value, it is called a process
* 6. Return data by using the return statement
* 7. The function execution ends when it reaches the return statement. Do not write code after this statement. You can also use return to end the execution of the function
*
* The role of the function name:
* 1. Call the function and start executing the function
* 2. You can pass data to the function
* 3. The function name is the returned value
*
*
*/
//A function that outputs a table
function table($tablename,$width,$row,$col)
{
echo '< table border="1" width="'.$width.'"align="center">';
echo '
'.$tablename.'
< ;/caption>';for($i=0;$i<$row;$i++)
{
//Change color every other row
if($i%2==0)
$bg="#cccccc";
else
$bg="yellow";
echo '
for($j=0;$j<$col;$j++)
{
echo '
echo '
'.($i*$row+$j).' | ';
}/td>';
}
echo '
}
echo '';
}
table("Output table",600,10,10);
table("Output table 2",300,6,6) ;
//Another output method
function table2($tablename,$width,$row,$col)
{
$str='
'.($i*$row+$j).' | ';
return $str;
}
echo table2("Direct output table",400,15,15);
?>

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

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

In this chapter, we will understand the Environment Variables, General Configuration, Database Configuration and Email Configuration in CakePHP.

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

To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.

To work on file upload we are going to use the form helper. Here, is an example for file upload.

In this chapter, we are going to learn the following topics related to routing ?

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

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

Validator can be created by adding the following two lines in the controller.
