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This article mainly introduces "what are the methods of obtaining multiple array differences in php". In daily operation, I believe that many people have doubts about the method of obtaining multiple array differences 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 questions of "what is the method of obtaining multiple array differences in php?" Next, please follow the editor to study!

Compare key value-array_diff function

The array_diff function is built into PHP to compare arrays by comparing key values, and then returns the difference between arrays. The basic syntax format of the array_diff function is as follows:

Array_diff (array1,array2,array3...)

It is important to note that the parameter array123 represents the array used for comparison and returns an array of result subtractions, the elements of which are included in the first array element. The returned array is a value that the other arrays in the first array do not have, and the key name remains the same in the returned array.

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

Output result:

Through the above example, through the array_diff function, the result returned is the difference between array 1 and other arrays. That is, the returned result is an element that is present in array 1 but not in other arrays. Of course, this is the key value of the comparison element, so let's take a look at the difference in the result returned by comparing the key name of the element.

Compare key name-array_diff_key function

In PHP, you can use the array_intersect_key function to compare key names between arrays and return the intersection between arrays, similarly, the array_diff_key function can compare key names and return the difference between arrays.

The basic syntax format of the array_diff_key function is as follows:

Array_diff_key (array1,array2,array3...)

It should be noted that the parameter array123 represents the array to be compared, and the elements in the returned subtraction array are all elements in array 1, but not in other array elements.

Next, let's take a look at the application of the array_diff_key function through an example, as follows:

Output result:

Through the above example, we compare the key names between arrays through the array_diff_key function, and then return the difference, and the result is the key names that are found in array 1 but not in other array elements. This is done by comparing key names. Let's take a look at how to compare key values and key names at the same time.

Compare key value with key name-array_diff_assoc function

In PHP, you can compare the key value with the key name through the array_intersect_assoc function, and then return the result of the intersection in the array elements, similar to the array_diff_assoc function, which also compares the key value and the key name, but the result returned is the difference in the array elements.

The basic syntax format of the array_diff_assoc function is as follows:

Array_diff_assoc (array1,array2,array3...)

It should be noted that the parameter array123 represents the array to be compared. By comparing the key value with the key name, the elements in the returned subtraction array are all elements in array 1, but not in other array elements.

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

Output result:

Through the above example, we use the array_diff_assoc function to compare the key values and key names between arrays, and then return the difference, which is the element in array 1, but not in other arrays.

At this point, the study of "what are the methods of getting multiple array differences 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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