Home > Article > Backend Development > How to use the str_word_count function in PHP to count the number of words in a string
In PHP development, counting the number of words in a string is a common task. The str_word_count function in PHP provides a simple, fast and reliable way to count the number of words in a given string.
This article will introduce how to use the str_word_count function in PHP to count the number of words in a string, including the usage, return value and practical application scenarios of this function.
1. Function introduction
The str_word_count function is a string processing function built into PHP, which is used to count the number of words in a string. This function supports three parameters, which are the string to be counted, the pattern and the optional character set.
The function prototype is:
str_word_count(string $string, int $format = 0, string|null $char_list = null): mixed
Among them, $string means to Statistical string, $format represents the format of the returned result, $char_list is an optional character set parameter.
2. Return value
The return value of the str_word_count function depends on the setting of the $format parameter. Specifically, the $format parameter has the following options:
3. Usage Examples
The following uses several examples to illustrate the use of the str_word_count function.
90727a8e552008fff9d04c321d7c4550
The output result is:
The number of words is: 6
95ec6bafe0431fa640b2ddf9ceb7afb9
The output result is:
Array
(
[0] => Hello [1] => world [2] => How [3] => are [4] => you
)
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The output result is:
Array
(
[0] => 0 [1] => 6 [2] => 12 [3] => 16 [4] => 20
)
4. Summary
This article introduces the basic usage of the str_word_count function in PHP and the meaning of the return value. Through this function, we can easily count the number of words in the string and their positions, so as to better perform string processing.
In addition to counting the number of words, the str_word_count function can also be used to implement other functions, such as deleting all words or converting words into arrays. In actual development, we can use this function flexibly to make the code more concise and efficient.
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