How to get the first few data of an array in php

The array_slice() function can be used in php to obtain the first few data of the array. This function can return the selected part of the array. The syntax is "array_slice(array,0,length)"; the parameter length specifies the length of the returned array. Length, just get the number of digits of data needed and set the integer value.

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

In php, you can use array_slice () function gets the first few data of the array.

Example: Get the first two data of the array

<?php
$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,0,2));
?>

Output:

rray ( [0] => red [1] => green )

Description:

## The #array_slice() function is used to return the selected part of the array; this function can take out a segment of value in the array based on conditions and return it.

Syntax:

array_slice(array,start,length,preserve)

ParametersDescriptionRequired. Specifies an array. Required. numerical value. Specifies the starting position of the element to be retrieved. 0 = first element. If the value is set to a positive number, it will be taken from front to back. If the value is set to a negative number, the absolute value of start is taken from back to front. -2 means start from the second to last element of the array. Optional. numerical value. Specifies the length of the returned array. If the value is set to an integer, this number of elements is returned. If this value is set to a negative number, the function will terminate fetching this far from the end of the example array. If this value is not set, all elements starting from the position set by the start parameter to the end of the array are returned. Optional. Specifies whether the function retains key names or resets key names. Possible values:

array
start
length
preserve	true - Reserve key name false - default. Reset key name

• 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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