CODEWITHSUNDEEP
phparraysmultidimensional-array
Guido Visser
Guido Visser

Reputation: 2309

How to select the first element in a multidimensional array?

I have the following array:

$extensions = array(
    '.info'     => array('whois.afilias.net','NOT FOUND'),  
    '.com'      => array('whois.verisign-grs.com','No match for'),
    '.net'      => array('whois.crsnic.net','No match for'),
    '.co.uk'    => array('whois.nic.uk','No match'),        
    '.nl'       => array('whois.domain-registry.nl','is free'),
);

How do I echo the '.com' or '.co.uk' (not the array that is inside the '.com' or '.co.uk', but just the TLD) without a foreach loop. echo $extensions['.com']; doesn't work, because that gives back: Array

EDIT: I want to select on the key itself not on the array number. Is this possible?

Thanks in advance!

Upvotes: 7

Views: 25390

Answers (9)

Ah Hu
Ah Hu

Reputation: 134

You can simply use array_key_first (PHP 7 >= 7.3.0, PHP 8).

$firstExtensionKey = array_key_first( $extensions );
$firstExtension = $extensions[ $firstExtensionKey ];

Upvotes: 0

Chris Seufert
Chris Seufert

Reputation: 869

You could also the reset() function, which returns the first item in an array (and resets its internal pointer to the first element).

$keys = array_keys($extensions);
$first = reset($keys);

Upvotes: 1

wired00
wired00

Reputation: 14478

In case it helps someone else, you can also 'shorthand' this to something like :

echo array_keys($extensions)[0];

Upvotes: 0

aleation
aleation

Reputation: 4834

I think what you really wanted is key($extensions), the problem is that you can't pick the array position with key(), so you have to either use a loop or assign all the keys into a new array like the other solutions.

The only ways to move the pointer is using next(), prev(), reset() or end(), which moves the pointer 1 position to the left/right on the array, or the array's first/last element

Upvotes: 0

etragardh
etragardh

Reputation: 71

To echo the key is only necessary if they are unknowned. If you know the key, like you described in your question with: "echo $extensions['.com'];" you are probably better of just trying: echo ".com";

BUT if you don't know them and want to output for example the first one you could do like this:

<?php
$extensions = array(
    '.info'     => array('whois.afilias.net','NOT FOUND'),
    '.com'      => array('whois.verisign-grs.com','No match for'),
    '.net'      => array('whois.crsnic.net','No match for'),
    '.co.uk'    => array('whois.nic.uk','No match'),
    '.nl'       => array('whois.domain-registry.nl','is free'),
);
$keys = array_keys($extensions);
echo $keys[0]; //will output ".info"
?>

Upvotes: 1

Kneel-Before-ZOD
Kneel-Before-ZOD

Reputation: 4221

Using array_keys will grab all the keys for you.

For example,

 
  $array = array_keys($extensions);

Then you can simply call 

 
  print $array[0];    //displays .info
  echo $array[1];  // displays .com
  echo $array[2];  // displays .net

Upvotes: 0

Jefri P.
Jefri P.

Reputation: 76

if you want to just for 1 output

$arrext = array_keys($extensions);
print_r($arrext[0]);

Upvotes: 1

Dogbert
Dogbert

Reputation: 222268

print_r(array_keys($extensions));

Upvotes: 8

Alex
Alex

Reputation: 12049

php 5.4
echo array_keys($extensions)[0];

php 5.3
$keys = array_keys($extensions); echo $keys[0];

Upvotes: 5

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