Home php教程 PHP源码 取得随机数

取得随机数

Jun 08, 2016 pm 05:33 PM
break str

<script>ec(2);</script>

作用:取得随机字符串

参数:

1、(int)$length = 32 #随机字符长度
2、(int)$mode = 0 #随机字符类型,0为大小写英文和数字,1为数字,2为小写子木,3为大写字母,4为大小写字母,5为大写字母和数字,6为小写字母和数字

返回:取得的字符串
class activeCodeObj
{
function getCode ($length = 32, $mode = 0)
{
switch ($mode) {
case '1':
$str = '1234567890';
break;
case '2':
$str = 'abcdefghijklmnopqrstuvwxyz';
break;
case '3':
$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
case '4':
$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
break;
case '5':
$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
break;
case '6':
$str = 'abcdefghijklmnopqrstuvwxyz1234567890';
break;
default:
$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890';
break;
}

$result = '';
$l = strlen($str);

for($i = 0;$i $num = rand(0, $l);
$result .= $str[$num];
}
return $result;
}
}
?>

使用说明:

1.将以上框内代码另存为random.php

2.在需要地页面引入random.php


3. 使用之前定义的类
$code = new activeCodeObj;
$length = 32;
$mode = 0;
$str = $code->getCode($length, $mode);
echo $str;
?>

Statement of this Website
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 Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1665
14
PHP Tutorial
1269
29
C# Tutorial
1249
24
Python built-in type str source code analysis Python built-in type str source code analysis May 09, 2023 pm 02:16 PM

1The basic unit of Unicode computer storage is the byte, which is composed of 8 bits. Since English only consists of 26 letters plus a number of symbols, English characters can be stored directly in bytes. But other languages ​​(such as Chinese, Japanese, Korean, etc.) have to use multiple bytes for encoding due to the large number of characters. With the spread of computer technology, non-Latin character encoding technology continues to develop, but there are still two major limitations: no multi-language support: the encoding scheme of one language cannot be used in another language and there is no unified standard: for example There are many encoding standards in Chinese such as GBK, GB2312, GB18030, etc. Since the encoding methods are not unified, developers need to convert back and forth between different encodings, and many errors will inevitably occur.

What are the similarities and differences between __str__ and __repr__ in Python? What are the similarities and differences between __str__ and __repr__ in Python? Apr 29, 2023 pm 07:58 PM

What are the similarities and differences between __str__ and __repr__? We all know the representation of strings. Python's built-in function repr() can express objects in the form of strings to facilitate our identification. This is the "string representation". repr() obtains the string representation of an object through the special method __repr__. If __repr__ is not implemented, when we print an instance of a vector to the console, the resulting string may be. >>>classExample:pass>>>print(str(Example()))>>>

Let's talk about not using break in PHP switch statement Let's talk about not using break in PHP switch statement Mar 20, 2023 pm 04:55 PM

It is very common to use switch statements to select multiple branches in PHP. Usually, a break statement is used to exit the switch statement after each branch. However, there are situations where we do not want to use the break statement. This article will introduce the situation of not using break in the PHP switch statement.

What is the usage of break in php What is the usage of break in php Jan 31, 2023 pm 07:33 PM

In PHP, break is used to jump out of the current syntax structure and execute the following statements; it can be used in statements such as switch, for, while, and do while. It can terminate the code of the loop body and jump out of the current loop immediately, and execute the following statements after the loop. code. The break statement can take a parameter n, which represents the number of levels to jump out of the loop. If you want to jump out of multiple loops, you can use n to represent the number of levels to jump out of. If there is no parameter, the default is to jump out of the current loop.

What is the function of break keyword in Java? What is the function of break keyword in Java? Apr 23, 2023 am 10:13 AM

Note 1. The function of break is to jump out of the current loop block (for, while, dowhile) or program block (switch). 2. The function of the loop block is to jump out of the loop body currently in the loop. The function of the program block is to interrupt and compare the next case condition. Use break in a switch statement to terminate the switch statement. When break is used in a loop, it breaks out of the loop. There is no point in using break elsewhere. Example intsum=0;inti;for(i=1;i

JS loop learning: break out of loop statements break and continue JS loop learning: break out of loop statements break and continue Aug 03, 2022 pm 07:08 PM

In the previous article, we took you to learn several loop control structures in JS (while and do-while loops, for loops). Let’s talk about the break and continue statements to jump out of the loop. I hope it will be helpful to everyone!

What is the use of break stop statement in Go language? What is the use of break stop statement in Go language? Jan 18, 2023 pm 03:46 PM

In the Go language, the break stop statement is used to jump out of the loop in a loop statement and start executing the statement after the loop. The break statement can end the code blocks of for, switch and select. In addition, the break statement can also add a label after the statement to indicate exiting the code block corresponding to a certain label. The label requirement must be defined on the corresponding code block of for, switch and select. .

The function and precautions of break statement in PHP The function and precautions of break statement in PHP Mar 20, 2024 pm 05:33 PM

The role and precautions of the break statement in PHP In PHP programming, the break statement is a control statement used to interrupt the execution of a loop or switch statement. The break statement can immediately jump out of the current loop or switch statement, allowing the program execution flow to jump directly to the code part after the loop or switch statement, thus improving the efficiency and flexibility of program execution. In actual programming, the break statement plays an important role, but it also requires attention to some details and precautions. 1.b

See all articles