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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
$ 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.
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