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This article mainly introduces "how to sort PHP arrays". In daily operation, I believe many people have doubts about how to sort PHP arrays. Xiaobian consulted all kinds of information and sorted out simple and easy operation methods. I hope to answer your doubts about "how to sort PHP arrays". Next, please follow the small series to learn together!

PHP array sorting

The elements in an array can be sorted alphabetically or numerically in descending or ascending order. Ascending is sorting from small to large, numbers are sorted from small to large, English letters are sorted in ascending order according to uppercase A-Z and then lowercase a-z. Descending is the reverse of ascending.

To sort an array, we use the array sort function:

sort(): Sort an array in ascending order

First of all, we need to know that sort is mostly used to sort numeric index arrays. If sort is used to arrange associative arrays, the keys of the array will be lost.

Examples are as follows:

Output:

rsort(): Sort arrays in descending order

After replacing the sort in the above example with rsort, the output result is:

As you can see from the above example, we have sorted the array in ascending order using the sort() function and sorted the array in descending order using the rsort() function.

asort(): Sorts an array in ascending order according to its value

Using the asort() function, the following example sorts associative arrays in ascending order according to their values, for example:

Output:

ksort(): Sorts the array in ascending order according to the keys of the associative array

Also according to the above example, sorting is performed by the ksort () function, for example:

Output:

Look at the result, sorting the array in ascending order according to the keys of the associative array.

arsort(): Sorts arrays in descending order according to the values of associative arrays

Replace ksort() with arsot() in the above example to try sorting according to the values of the associative array. The output is as follows:

krsort() : Sort arrays in descending order according to their keys

Replace the sorting function in the above example with krsort(), and the output is as follows:

At this point, the study of "how to sort PHP arrays" is over, hoping to solve everyone's doubts. Theory and practice can better match to help everyone learn, go and try it! If you want to continue learning more relevant knowledge, please continue to pay attention to the website, Xiaobian will continue to strive to bring more practical articles for everyone!

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