array operation - PHP

Question

$region_array = array( 

                                1 => 'Region 01', 
                                2 => 'Region 02',
                                3 => 'Region 03'
        );

What I'm trying is

array_slice($region_array, $index); & array_splice($region_array, $index); both does not give me required output.

Required output is

if the pass 2 as the index only 1st two element should be left. if I pass 3 1st three element should be left. How can I do it?
Then whatever the output array is I want to add 0 => 'Select Region' as the 1st option of the output array. I tried array_push. It adds the element to the end of the array. How can I fix it?

possible duplicate of php get the first N elements of an array? — Eric
– Eric, Commented Oct 17, 2012 at 7:13

Community · Accepted Answer · 2023-11-17 20:42:18Z

4

To answer point #2 first, use array_unshift -> https://www.php.net/manual/en/function.array-unshift.php

To point #1, use array_slice($region_array, 0, $index);

edited Nov 17, 2023 at 20:42

CommunityBot

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answered Oct 17, 2012 at 7:11

Jon

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Crazy4Php · Accepted Answer · 2012-10-17 07:29:31Z

3

`<?php 
    $region_array = array( 
        1 => 'Region 01', 
        2 => 'Region 02',
        3 => 'Region 03'
    );
    $array = array_slice($region_array, 0, 2);
    array_unshift($array, 'Select Region');
    echo '<pre>';
    print_r($array);
 ?>`

answered Oct 17, 2012 at 7:29

Crazy4Php

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Comments

Maxim Krizhanovsky · Accepted Answer · 2012-10-17 07:15:04Z

1

$array = array_slice($region_array, 0, $index)
array_unshift($array, 'Select Region');

read the documentation for array_slice and array_unshift

edited Oct 17, 2012 at 7:15

answered Oct 17, 2012 at 7:09

Maxim Krizhanovsky

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1 Comment

Jon Over a year ago

you don't need to use array('0' => 'Select Region'), in fact, I think that will push an array on to the front and make it two-dimensional. just need array_unshift($array, 'Select Region');

Ja͢ck · Accepted Answer · 2012-10-17 07:35:30Z

1

Since your array indices are greater than zero you can use this one-liner as well:

$result = array('Select region') + array_slice($region_array, 0, $index, true);

The + operator works on arrays and concatenates the second array (only the items whose key doesn't intersect with the first).

answered Oct 17, 2012 at 7:35

Ja͢ck

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