How to intercept the first few of php array

How to intercept the first few data of php array: first create a PHP sample file; then define an array; finally intercept the first few data of the array through "array_slice($arr,0,4);" .

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

php function array_slice is used ( Get the first and last digits of the array)

array_slice() function takes out a segment of value in the array based on conditions and returns it.

Syntax: array_slice(array,start,length,preserve)

Get the first 4 digits of the array

array_slice($arr,0,4);

Get the last 4 digits of the array

array_slice($arr,-4,4);

or

array_slice($arr,-4);

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