How to get the length of an array or the number of occurrences of a certain value in PHP_PHP Tutorial

How to get the length of an array or the number of occurrences of a certain value in PHP

This article mainly introduces the method of getting the length of an array or the number of occurrences of a certain value in PHP. The example analyzes count () and array_count_value(), friends in need can refer to it

The example in this article describes how PHP obtains the length of an array or the number of occurrences of a certain value. Share it with everyone for your reference. The specific analysis is as follows:

count(): Count the number of elements in the array;

For example:

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1 2	$arr = Array('0','1','2','3','4'); echo count($arr); // 输出 5

1 2

$arr = Array('0','1','2','3','4');

echo count($arr); // Output 5

sizeof() and count() have the same purpose. Both functions can return the number of array elements. You can get the number of elements in a regular scalar variable. If the array passed to this function is an empty array , or a variable that has not been set, the number of array elements returned is 0;

1 2	$array=array(4,5,1,2,3,1,2,1); $ac=array_count_value($array);

array_count_value() counts the number of times each specific value appears in the array $array; For example:

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1 2	$array=array(4,5,1,2,3,1,2,1); $ac=array_count_value($array);

will create an array named $ac, which includes: Keyword Value 4 1 5 1 1 3 2 2 3 1 I hope this article will be helpful to everyone’s PHP programming design.

http://www.bkjia.com/PHPjc/956989.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/956989.htmlTechArticleHow to get the length of an array or the number of occurrences of a certain value in PHP. This article mainly introduces how to get the length of an array or the number of occurrences of a certain value in PHP. Method for the number of occurrences of a value, an example analysis of count() and array_count_value(...