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This article mainly explains how php disrupts the array and selects several array elements at random. Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how php disrupts the array and selects several array elements at random.

Methods: 1, use shuffle () to randomly disrupt the array; 2, use array_rand () to randomly get multiple key names from the array, return an array of key names; 3, use foreach statements to traverse the array of key names, take values from the disordered array according to the key names obtained, and assign values to a new array; 4, output the new array after traversal.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php disrupts the array and randomly selects several array elements.

You can use the shuffle () function to scramble an array

Randomly select array elements: you can use the array_rand () function and foreach statements

The array_rand () function returns random key names in the array. The array_rand () function takes two arguments: the first argument, $array, specifies the array, and the second parameter, $number, specifies the number of key names to get.

When the array_rand () function gets multiple key names, it returns an array of random key names, $rands.

This allows us to use the foreach statement to iterate through the $rands array, constantly taking values from the $arr array based on the key names in the $rands array, and assigning values to the new array $arr2.

Implementation code:

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