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This article introduces the knowledge of "which is the function of finding the intersection of two arrays in php". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

There are 8 intersection functions: 1, array_intersect (), only compare key values; 2, array_intersect_assoc (), compare key names and key values; 3, array_intersect_key (), only compare key names; 4, array_uintersect (), and so on.

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

Php provides functions such as finding the intersection of multiple arrays:

Array_intersect (): compare arrays and return the intersection of two arrays (only compare key values).

Array_intersect_assoc (): compares arrays and returns the intersection of two arrays (compare key names and key values).

Array_intersect_key (): compare arrays and return the intersection of two arrays (only compare key names).

Array_intersect_uassoc (): compare arrays and return the intersection of two arrays (compare key names and key values, using user-defined comparison functions).

Array_intersect_ukey (): compare arrays and return the intersection of two arrays (only compare key names, using user-defined comparison functions).

Array_uintersect (): compare arrays and return the intersection of two arrays (only compare key values, using a user-defined comparison function).

Array_uintersect_assoc (): compare arrays and return the intersection of two arrays (compare key names and key values, compare key values using built-in functions, compare key values using user-defined functions).

Array_uintersect_uassoc (): compare arrays and return the intersection of two arrays (compare key names and key values, using two user-defined comparison functions).

Let's introduce the common comparison functions for finding the intersection of arrays.

1. Array_intersect () function

The array_intersect () function compares the values of two (or more) arrays and returns the intersection.

This function compares the values of two (or more) arrays and returns an intersecting array that contains all the values that appear in the array1 as well as in all other parameter arrays.

2. Array_intersect_assoc () function

The array_intersect_assoc () function compares the key names and key values of two (or more) arrays and returns the intersection.

This function compares the key names and key values of two (or more) arrays and returns an intersecting array that includes all the key names and values in the array being compared (array1), as well as in any other parameter array (array2, array3, etc.).

3. Array_intersect_key () function

Description: less commonly used comparison functions

Array_intersect_uassoc ()

Array_intersect_ukey ()

Array_uintersect ()

Array_uintersect_assoc ()

Array_uintersect_uassoc ()

They all use user-defined functions to compare functions

Example:

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