How does php determine whether two arrays have the same value?
This article introduces the knowledge of "how to judge whether two arrays have the same value". 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!
Method: 1, use array_intersect () to compare the values of two arrays, syntax "array_intersect (array 1, array 2)", will return an intersection array; 2, determine whether the intersection array is empty, the syntax "intersection array = = []", if it is empty, there is no same value, if it is not empty, there is the same value.
Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
Php determines whether two arrays have the same value.
1. Use the array_intersect () function to compare two arrays to get the intersection elements
The array_intersect () function compares the values of two (or more) arrays and returns an intersecting array.
If two arrays have the same value, there are elements in the intersection array, not an empty array
If the two arrays do not have the same value, there are no elements in the intersection array, it is an empty array
2. Determine whether the intersection array is an empty array
If it is an empty array, the two arrays do not have the same value
If it is not an empty array, the two arrays have the same value
The intersection of array 1 and array 2 of echo:
"; $intersect=array_intersect ($arr1,$arr2); var_dump ($intersect); if ($intersect== []) {echo" two arrays do not have the same value
";} else {echo" two arrays have the same value
The intersection of ";} echo" array 2 and array 3:
"; $intersect=array_intersect ($arr3,$arr2); var_dump ($intersect); if ($intersect== []) {echo" two arrays do not have the same value
";} else {echo" two arrays have the same value
";}
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