无法将值添加到关联数组php

Question

I have an issue with adding value at the first position in an associative array, i've tried googling on the internet, used several methods to add a value but still it's not adding the value at the first position.

what i tried is

array_unshift($output_countries['CountryName'], "India");

but it doesn't work

my PHP code:

while($rows_fetch_country_list = mysql_fetch_array($query_country_list)) {
    extract($rows_fetch_country_list);


      $output_countries[] = array(
           "CountryName" => $country_name,
           "CountryCode" => $country_code,
           "Id" => $pk_country_id
      );


}

any suggestions? thanks!

Answer 1

Here is how you can prepend a value to an existing array. You're correct to use unshift, but you probably want your static value to look like your DB records, and the first parameter for unshift should just be the target array.

<?php
//Your static record
$staticCountry = ['CountryName' => 'India',  'CountryCode' => 'IN', 'Id' => 0];

//Results from DB
$countries = [
    ['CountryName' => 'Canada',  'CountryCode' => 'CA', 'Id' => 1],
    ['CountryName' => 'France',  'CountryCode' => 'FR', 'Id' => 2],
    ['CountryName' => 'Germany',  'CountryCode' => 'DE', 'Id' => 3]
];    

array_unshift($countries, $staticCountry);

Answer 2

Please use this technique:

    $country[0] = array("Nepal" => "Nepal", "CountryCode" => 'NP',"Id" => 01);
    $country[1] = array("India" => "India", "CountryCode" => 'IN',"Id" => 02);
    $firstItem[0] = array('Pakistan' => 'Pakistan',"CountryCode" => 'PK',"Id" => 03);

    $arr= array_merge($firstItem, $country);
    print_r($arr);