Home Backend Development PHP Tutorial php统计全部字符在字符串中出现的次数

php统计全部字符在字符串中出现的次数

Jun 13, 2016 pm 01:25 PM
array count found str

php统计所有字符在字符串中出现的次数

效果如图



算法:

循环一次字符串(本例的$str),把出现过的字符串记录在一个数组(如本例的$strRecord)内,如果已经此记录函数已经有,则不记录;

在每个字符串时,拿来与记录数组的值进行比较(本例的$strRecord[]['key']),如果记录里的某个值和这个字符串一样,就记录次数+1(本例的$strRecord[]['count']);

当然,设置一个变量,默认为false(如本例的$found),记录每次比较完,如果记录数组已经有这个值,就设置为true,通过这个标记,把没有遇到过的数组记录到数组里

代码:


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

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 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)

The difference between counta and count The difference between counta and count Nov 20, 2023 am 10:01 AM

The Count function is used to count the number of numbers in a specified range. It ignores text, logical values, and null values, but counts empty cells. The Count function only counts the number of cells that contain actual numbers. The CountA function is used to count the number of non-empty cells in a specified range. It not only counts cells containing actual numbers, but also counts the number of non-empty cells containing text, logical values, and formulas.

Sort array using Array.Sort function in C# Sort array using Array.Sort function in C# Nov 18, 2023 am 10:37 AM

Title: Example of using the Array.Sort function to sort an array in C# Text: In C#, array is a commonly used data structure, and it is often necessary to sort the array. C# provides the Array class, which has the Sort method to conveniently sort arrays. This article will demonstrate how to use the Array.Sort function in C# to sort an array and provide specific code examples. First, we need to understand the basic usage of the Array.Sort function. Array.So

Simple and clear method to use PHP array_merge_recursive() function Simple and clear method to use PHP array_merge_recursive() function Jun 27, 2023 pm 01:48 PM

When programming in PHP, we often need to merge arrays. PHP provides the array_merge() function to complete array merging, but when the same key exists in the array, this function will overwrite the original value. In order to solve this problem, PHP also provides an array_merge_recursive() function in the language, which can merge arrays and retain the values ​​of the same keys, making the program design more flexible. array_merge

How to use the array_combine function in PHP to combine two arrays into an associative array How to use the array_combine function in PHP to combine two arrays into an associative array Jun 26, 2023 pm 01:41 PM

In PHP, there are many powerful array functions that can make array operations more convenient and faster. When we need to combine two arrays into an associative array, we can use PHP's array_combine function to achieve this operation. This function is actually used to combine the keys of one array as the values ​​of another array into a new associative array. Next, we will explain how to use the array_combine function in PHP to combine two arrays into an associative array. Learn about array_comb

Detailed explanation of PHP array_fill() function usage Detailed explanation of PHP array_fill() function usage Jun 27, 2023 am 08:42 AM

In PHP programming, array is a very important data structure that can handle large amounts of data easily. PHP provides many array-related functions, array_fill() is one of them. This article will introduce in detail the usage of the array_fill() function, as well as some tips in practical applications. 1. Overview of the array_fill() function The function of the array_fill() function is to create an array of a specified length and composed of the same values. Specifically, the syntax of this function is

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.

How to use the Array module in Python How to use the Array module in Python May 01, 2023 am 09:13 AM

The array module in Python is a predefined array, so it takes up much less space in memory than a standard list, and can also perform fast element-level operations such as adding, deleting, indexing, and slicing. In addition, all elements in the array are of the same type, so you can use the efficient numerical operation functions provided by the array, such as calculating the average, maximum, and minimum values. In addition, the array module also supports writing and reading array objects directly into binary files, which makes it more efficient when processing large amounts of numerical data. Therefore, if you need to process a large amount of homogeneous data, you may consider using Python's array module to optimize the execution efficiency of your code. To use the array module, you first need to

Summary of usage differences of MySQL Count function Summary of usage differences of MySQL Count function Nov 29, 2022 pm 04:47 PM

This article introduces to you the usage differences of MySQL’s Count function. The need for statistical data is very easy to encounter in our daily development. MySQL also supports a variety of calculation functions. Next, let’s take a look at the differences between them. , and whether they have some pitfalls.

See all articles