Backend Development
PHP Tutorial
PHP array operation method to calculate the product of array elements
PHP array operation method to calculate the product of array elements
In the previous article "PHP Array Operation: Method of Calculating the Sum of All Elements in an Array", we introduced in detail the relevant knowledge on how to calculate the sum of all elements in an array in PHP. In this article we will continue Let’s take a look at the knowledge of arrays in PHP. After reading how to calculate the sum of the elements of an array, let’s look at how to calculate the product of the elements of an array. I hope everyone has to help!
In the previous article we learned that we want to calculate the element sum of array elements, we can use the for loop sum we learned at the beginning foreachLoop, these two methods are a bit complicated. There is a built-in array_sum function in PHP that can calculate the sum of elements in an array.
If you want to calculate the product of array elements, it is very simple. It is similar to calculating the sum of array elements. You can use for loop and foreach loop. The same is true in PHP. There is a built-in function array_product that can calculate the product of array elements. Let’s introduce these three methods separately.
Through for loop
In the previous article "How to use For loop and Foreach in PHP Loop (detailed picture and text) " We have already introduced the for loop in PHP, so we won’t go into too much detail here. Let’s look directly at an example of how to use a for loop. Multiply the array elements. The example is as follows:
<?php
$array= array('24','56','180',8,100,'100.1','3.5');
$sum=1;
for ($i=0; $i < count($array); $i++) {
$sum*=$array[$i];
}
echo '通过for循环得到：'. $sum;
?>Output result:
Through the above example we found that among the array elements, not only When there are only numerical values, there are strings like "24" and "56" in the example, which are not numerical values and will be converted into numerical values and added to the multiplication team.
Friends who have read the previous article on summation may have noticed that the difference between the code and the previous article is not only that the summation process has changed, but also that the variable $sum has become 1 , because it is used to calculate multiplication, so it was changed to 1.
Another situation is that the elements in the array are not just numerical values. What will happen if other strings appear? Let’s take a look at an example. The example is as follows:
<?php
$array= array('24k','56kg','180cm',8,100,'100.1','3.5');
$sum=1;
for ($i=0; $i < count($array); $i++) {
$sum*=$array[$i];
}
echo '通过for循环得到：'. $sum;
?>Output result:
In the above example, the elements in the array Not just strings, but also strings with numerical elements like "24k" and "56kg". In this case, they will also be automatically converted into numerical values.
The above is the process of performing quadrature of array elements through for loop. Next, let’s take a look at how to perform quadrature through foreach loop.
ThroughforeachLoop
As usual, let’s take a look at the use of foreach through examples. The examples are as follows:
<?php
$array= array('24k','56kg','180cm',8,100,'100.1','3.5');
//通过for循环
$sum=1;
for ($i=0; $i < count($array); $i++) {
$sum*=$array[$i];
}
echo '通过for循环求得数组内元素的积为：'. $sum;
echo '<br/>';
//通过foreach循环
$sum1=1;
foreach ($array as $value) {
$sum1*=$value;
}
echo '通过foreach循环求得数组内元素的积为：'. $sum1;
?> Output result:
As you can see from the above example, the foreach loop, like the for loop, will convert the string elements in the array. Let's introduce the built-in array_product function in PHP.
Through the array_product function
In PHP, you can use the array_product function to perform array operations For calculation of multiplication, the basic syntax format of the array_product function is as follows:
array_product(array)
It should be noted that the parameter array is the array to be multiplied, and the result returned after the function is run is the array. The product of all elements within. where this element is an integer and a floating point number. If this array is an empty array, the result returned after PHP5.3.6 will be 1.
Let’s take a look at the use of function array_product through an example. The example is as follows:
<?php
$array= array('24k','56kg','180cm',8,100,'100.1','3.5');
//通过for循环
$sum=1;
for ($i=0; $i < count($array); $i++) {
$sum*=$array[$i];
}
echo '通过for循环求得数组内元素的积为：'. $sum;
echo '<br/>';
//通过foreach循环
$sum1=1;
foreach ($array as $value) {
$sum1*=$value;
}
echo '通过foreach循环求得数组内元素的积为：'. $sum1;
echo '<br/>';
//通过array_product函数
echo '通过array_product函数求得数组内元素的积为：'. array_product($array);
?>Output result:
From this we calculated the array through three methods: for loop, foreach loop and array_product function Product of elements.
If you are interested, you can click on "PHP Video Tutorial" to learn more about PHP knowledge.
The above is the detailed content of PHP array operation method to calculate the product of array elements. For more information, please follow other related articles on the PHP Chinese website!
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
1662
14
1419
52
1311
25
1261
29
1234
24
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
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
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
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,
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
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.
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
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
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
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.
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.
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
