Analysis on new Array functions in PHP4

Source: Internet
Author: User
The array function of php4 has three new members: array_unique (), array_intersect (), and array_diff (). As the name suggests, these three functions are simple: 1. the array function of array_unique (arrayarray) php4 has three new members;

Array_unique (), array_intersect (), and array_diff ().



As the name suggests, these three functions are simple:



1. array_unique (array) ------- removes repeated elements from the array and returns the array

Eg:

$ Arr = array ("a", "B", "c", "B ");

$ Arr = array_unique ($ arr );

Var_dump ($ arr); ---- show $ arr only contains three elements: "a", "B", "c"



2. array_intersect (array array1, array, array2...) ---- returns the elements of multiple arrays in the form of arrays.

Eg:

$ Arr1 = array ("a", "B", "c", "d ");

$ Arr2 = array ("e", "f", "B", "");

$ Arr = array_unique ($ arr );

Var_dump ($ arr); ---- display $ arr contains two elements: "a", "B"



3. array_diff (array array1, array array2) ----- returns the elements that array1 does not have compared to array2.

Eg:

$ Arr1 = array ("a", "B", "c", "d ");

$ Arr2 = array ("e", "f", "B", "");

$ Arr = array_unique ($ arr );

Var_dump ($ arr); ---- display $ arr contains two elements: "c", "d"



I think php4 is more humane.
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