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This article mainly introduces "how to solve the problem of sorting and disrupting arrays in PHP". In daily operation, I believe many people have doubts about how to solve the problem of sorting and disrupting arrays in PHP. Xiaobian consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts of "how to solve the problem of sorting and disrupting arrays in PHP". Next, please follow the editor to study!

Array_multisort function-sorts multiple arrays

In PHP, the array_multisort function can enter one or more arrays. The function sorts the first array first and then the next array. The basic syntax format of the array_multisort function is as follows:

Array_multisort (array1,sorting order,sorting type,array2,array3...)

Among them, it should be noted that:

The parameter array1 is required, which is the array to be sorted, and the parameters array2 and 3 are optional and are also the array to be sorted. The parameter sorting order is also an optional parameter. By default, the parameter represents SORT_ASC, indicating that the array sort is in ascending order, and when the singular sorting order is SORT_DESC, it means sorting in descending order.

The parameter sorting type is also an optional parameter, and the default value of SORT_REGULAR indicates that the array is sorted in normal order. When the value of the parameter is SORT_NUMERIC, it means that the elements in the array are treated as numbers. When the value of the parameter is SORT_STRING, the elements in the array are treated as strings. When the value of the parameter is SORT_LOCALE_STRING, it is treated as a string that is changed through the setlocale function. When the value of the parameter is SORT_NATURAL, it represents a natural sort similar to natsort ().

Use the array_multisort function to sort strings, and elements with key names of strings will be retained, but keys with numbers will be re-indexed. The index rules are still the same.

If the sort is successful, the result is true;. If the sort fails, the result is false.

Let's take a look at the basic usage of the array_multisort function through an example, as follows:

Output result:

In the above example, the returned result is sorted in ascending order. Let's take a look at how the output changes when the two values are the same. The example is as follows:

Output result:

In the above example, when the two elements in the array are the same, they are not overwritten, but are reordered with different key names.

Let's look at a comprehensive example of what happens to the output when we merge two arrays and arrange them in descending order. The example is as follows:

Output result:

In the above, we can sort the array elements through the array_multisort function. Let's introduce the shuffle function. It can disrupt the array.

Shuffle function-reorder the array

Since there are functions in PHP that can sort array elements in order, there are also ways to reorder arrays, that is, to scramble them. The basic syntax structure of the shuffle function is as follows:

Shuffle (array)

The parameter array is the array that needs to be reordered, and the shuffle () function rearranges the elements in the array in random order. The original key name in the array will be deleted and the new array will have a new key name.

If the function is sorted successfully, the result is true, and if it fails, the result is flase.

Let's take a look at the use of the shuffle function through an example, as follows:

Output result:

In the above example, the array is rearranged through the shuffle function, and the order of the array changes each time it is executed.

At this point, the study on "how to solve the problem of sorting and disrupting arrays in PHP" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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