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This article mainly explains "php how to efficiently randomly extract the specified records algorithm through the array", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let Xiaobian take you to learn "how to extract the specified records efficiently and randomly through arrays in php"!

php uses array_rand() function to efficiently randomly extract a specified number of records, which can randomly extract records from the database, suitable for random display and lottery procedures.

The algorithm mainly uses php's array_rand() function. Let's take a look at the main functions of the array_rand() function:

array_rand-Randomly select one or more elements from an array

mixed array_rand(array $input[,int $num_req] )

array_rand() is useful when you want to extract one or more random elements from an array. It takes input as an input array and an optional parameter num_req, which indicates how many cells you want to take out-if not specified, the default is 1.

array_rand() returns the key name of a random unit if you only take one, otherwise it returns an array of random keys. This allows you to randomly extract keys and values from the array.

Let's look at a small example:

The copy code is as follows:

This function randomly extracts the record number from the $list array, and only needs to record the content.

Here is an example of a database randomly extracting a particular record:

The copy code is as follows:

At this point, I believe that everyone has a deeper understanding of "how to efficiently randomly extract specified records through arrays in php", so let's actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!

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