How to achieve the operation of taking only the first ten of the array in php

As a PHP developer, array operations are one of the essential daily skills. In actual business, we often encounter situations where we need to take only the first few elements of an array. This article will introduce how to implement the operation of taking only the first ten elements of an array in PHP.

1. Use the array_slice function

The array_slice function is one of the most commonly used functions in PHP. This function can remove a segment of elements from an array according to the index.

Sample code:

$data = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);

$firstTen = array_slice($data, 0, 10);

print_r($firstTen);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
    [6] => 7
    [7] => 8
    [8] => 9
    [9] => 10
)

The array $data contains 15 elements. We can use the array_slice function to take out 10 elements starting from the 0th index. element, that is, taking out the first 10 elements in the array. Run the above code and the output will be the first 10 elements taken out.

2. Use for loop

Use for loop to traverse the array. You can determine whether the index of the array element is less than 10 one by one. If it is less than 10, store it in a new array. When the new array length When 10 is reached, the loop is aborted.

Sample code:

$data = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);

$newArr = array();

for ($i = 0; $i < count($data); $i++) {
    if ($i < 10) {
        $newArr[] = $data[$i];
    } else {
        break;
    }
}

print_r($newArr);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
    [6] => 7
    [7] => 8
    [8] => 9
    [9] => 10
)

3. Use the array_splice function

The array_splice function can not only delete array elements, but also remove elements from the array Remove a range of elements and return them.

Sample code:

$data = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);

$firstTen = array_splice($data, 0, 10);

print_r($firstTen);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
    [6] => 7
    [7] => 8
    [8] => 9
    [9] => 10
)

Use the array function array_splice to take out the first 10 elements in the array $data and save them to the array $firstTen. Running the above code will give you the same results as the first two methods.

To sum up, we can use array_slice, for loop, array_splice and other methods to achieve the operation of taking only the first ten elements of the array, which has high flexibility and adaptability. For different business needs, we can choose different methods to operate.

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