Four ways to generate strings with random words in PHP
The content of this article is to share with you four methods of generating strings with random words in PHP. It has certain reference value. Friends in need can refer to it
The following introduces four basic methods of generating random strings:
Method 1:
1 , generate a random integer between 33 – 126, such as 35.
2. Convert 35 into the corresponding ASCII code character, such as 35 corresponding to #.
3. Repeat steps 1 and 2 above n times to connect to an n-digit password.
This algorithm mainly uses two functions. The mt_rand (int $min, int $max) function is used to generate random integers, where $min – $max is the range of ASCII codes, here it is 33-126, The range can be adjusted as needed. For example, 97-122 bits in the ASCII code table correspond to the English letters a-z. For details, please refer to the ASCII code table; the chr (int $ascii) function is used to convert the corresponding integer $ascii into the corresponding character.
function create_password($pw_length =
{
$randpwd = ”;
for ($i = 0; $i < $pw_length; $i++)
{
$randpwd .= chr(mt_rand(33, 126));
}
return $randpwd;
}
// 调用该函数，传递长度参数$pw_length = 6
echo create_password(6);##Method Two:
1. Preset a string $chars, including a – z, A – Z, 0 – 9, and some special characters.
2. Randomly pick a character from the $chars string.
3. Repeat the second step n times to get a password of length n.
function generate_password( $length = 8 )
{
// 密码字符集，可任意添加你需要的字符
$chars = ‘abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_
[]{}<>~`+=,.;:/?|';
$password = ”;
for ( $i = 0; $i < $length; $i++ ) {
// 这里提供两种字符获取方式
// 第一种是使用 substr 截取$chars中的任意一位字符；
// 第二种是取字符数组 $chars 的任意元素
// $password .= substr($chars, mt_rand(0, strlen($chars) – 1), 1);
// $password .= $str{mt_rand(0,strlen($chars) - 1)};
//生成php随机数
$password .= $chars[ mt_rand(0, strlen($chars) - 1) ]; } return $password; }##Method Three:
## 1. Preset a character array $chars, including a – z, A – Z, 0 – 9, and some special characters. 2. Use array_rand() to randomly select $length elements from the array $chars.
3. According to the obtained key name array $keys, take out the characters from the array $chars and concatenate the string. The disadvantage of this method is that the same characters will not be retrieved repeatedly. function make_password( $length = 8 )
{
// 密码字符集，可任意添加你需要的字符
$chars = array(‘a', ‘b', ‘c', ‘d', ‘e', ‘f', ‘g', ‘h',
i', ‘j', ‘k', ‘l','m', ‘n', ‘o', ‘p', ‘q', ‘r', 's',
‘t', ‘u', ‘v', ‘w', ‘x', ‘y','z', ‘A', ‘B', ‘C', ‘D',
‘E', ‘F', ‘G', ‘H', ‘I', ‘J', ‘K', ‘L','M', ‘N', ‘O',
‘P', ‘Q', ‘R', ‘S', ‘T', ‘U', ‘V', ‘W', ‘X', ‘Y','Z',
‘0′, ‘1′, ‘2′, ‘3′, ‘4′, ‘5′, ‘6′, ‘7′, ‘8′, ‘9′, ‘!',
‘@','#', ‘$', ‘%', ‘^', ‘&', ‘*', ‘(‘, ‘)', ‘-', ‘_',
‘[', ']‘, ‘{‘, ‘}', ‘<', ‘>', ‘~', ‘`', ‘+', ‘=', ‘,',
‘.', ‘;', ‘:', ‘/', ‘?', ‘|');
// 在 $chars 中随机取 $length 个数组元素键名
$keys =array_rand ($chars, $length);
$password = ”;
for($i = 0; $i < $length; $i++)
{
// 将 $length 个数组元素连接成字符串
$password .= $chars[$keys[$i]];
}
return $password;
}
：## The basic idea is to encrypt md5 and generate a 32-bit stringMT_RAND generates a random number of the specified range
Time, you can get the timestamp Use random number Current timestamp, you can get a random number that will not be repeated if (!isset ($str{5})) is better than if (strlen ($str) < 5). The above is the detailed content of Four ways to generate strings with random words in PHP. For more information, please follow other related articles on the PHP Chinese website!
code as follows:
## $rand = md5(time() . mt_rand(0,1000));
Supplementary: Add a curly bracket {} after the PHP variable and fill in the numbers, which refers to the characters of the corresponding serial number of the PHP variable.
/ The output is e If you want to check whether a string meets the specified length, you can consider using braces (braces) plus isset to replace the strlen function. Because isset is a language structure and strlen is a function, use isset More efficient than using strlen.
For example, to determine whether the length of a string is less than 5:
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
1669
14
1428
52
1329
25
1273
29
1256
24
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
PHP and Python: Different Paradigms Explained
Apr 18, 2025 am 12:26 AM
PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.
PHP vs. Other Languages: A Comparison
Apr 13, 2025 am 12:19 AM
PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.
PHP and Python: Code Examples and Comparison
Apr 15, 2025 am 12:07 AM
PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
