Add keys in associative php array as per reference - php

Question

I have an array, so I wanted to add keys to each value, for example, if an array contains Facebook URL then the key should be Facebook if an array has a link of Instagram then the key should be Instagram and the list goes on.
Here's the code
<?php
foreach($social_media as $social){
$typesocial = $social['type'];
if($social['type'] === 'social network') {
$val[] = $social['url']['resource'];
}
}
print_r($val);
?>
Array (
[0] => https://plus.google.com/+beyonce
[1] => https://twitter.com/Beyonce
[2] => https://www.facebook.com/beyonce
[3] => https://www.instagram.com/beyonce/
[4] => http://www.weibo.com/beyonceofficial
)
It should become, if the value has a link of twitter then the key should be twitter if Instagram then it should be Instagram
Array (
[google] => https://plus.google.com/+beyonce
[twitter] => https://twitter.com/Beyonce
[facebook] => https://www.facebook.com/beyonce
[instagram] => https://www.instagram.com/beyonce/
[weibo] => http://www.weibo.com/beyonceofficial
)

Answer 1

$indexed = [
'https://plus.google.com/+beyonce',
'https://twitter.com/Beyonce',
'https://www.facebook.com/beyonce',
'https://www.instagram.com/beyonce/',
'http://www.weibo.com/beyonceofficial',
];
Assuming the host consists of 2 or 3 parts
$assoc = [];
foreach($indexed as $url) {
$host = explode('.', parse_url($url, PHP_URL_HOST));
switch (count($host)) {
case 2:
$assoc[$host[0]] = $url;
break;
case 3:
$assoc[$host[1]] = $url;
}
}
Will output $assoc as
array(5) {
'google' => string(32) "https://plus.google.com/+beyonce"
'twitter' => string(27) "https://twitter.com/Beyonce"
'facebook' => string(32) "https://www.facebook.com/beyonce"
'instagram' => string(34) "https://www.instagram.com/beyonce/"
'weibo' => string(36) "http://www.weibo.com/beyonceofficial"
}

Answer 2

This maybe? Hope to help
EDITED
$array = Array (
0 => 'https://plus.google.com/+beyonce',
1 => 'https://twitter.com/Beyonce',
2 => 'https://www.facebook.com/beyonce',
3 => 'https://www.instagram.com/beyonce/',
4 => 'http://www.weibo.com/beyonceofficial',
6 => 'http://www.bbc.co.uk/a/witty/documentary'
);
$output = Array();
foreach($array as $key => $url){
$urlarr = parse_url($url);
$arr = explode('.',$urlarr['host']);
$name = $arr[count($arr) - 2];
if($name == 'co'){
$name = $arr[count($arr) - 3];
}
$output[$name] = $url;
}
print_r($output);

Answer 3

You may want to use strpos() so you can find the words and add specific key, something like this:
$new_array = [];
foreach($old_array AS $value){
if(strpos($value, 'facebook')) {
$new_array['facebook'] = $value;
}elseif(strpos($value, 'instagram')) {
$new_array['instagram'] = $value;
}elseif(strpos($value, 'twitter')) {
$new_array['twitter'] = $value;
}else{ //so it goes...
$new_array['unknow'] = $value;
}
}
Of course if you have two url with facebook, the second will overwrite the first one so depends of what you need you may add an aditional index... like:
$new_array['facebook'][] = $value;
Hope it helps!

Answer 4

An quick/easy-ish way to approach this might be to do a regex match on the domains.
For example, if you have a finite set of social media and can trust the middle of the domain name, then you can extract that part of the url to put it as part of your key.
For example the regex /google|twitter/ would match google from https://plus.google.com/+beyonce. This can then be used for your key.
So looping through your set, you'd run preg_match which would attempt to find the key based on the domain name. preg_match has a parameter called $match that then stores the google part of what you're matching. You can use this to be the key of your formatted array.
$array = [
'https://plus.google.com/+beyonce',
'https://twitter.com/Beyonce',
'https://www.facebook.com/beyonce',
'https://www.instagram.com/beyonce/',
'http://badmedia.com/beyonce',
'http://www.weibo.com/beyonceofficial'
];
$keyed = [];
foreach ($array as $i => $url) {
preg_match('/google|twitter|facebook|instagram|weibo/', $url, $match);
$key = isset($match[0]) ? $match[0] : 'notfound-' . $i;
$keyed[$key] = $url;
}
The result here is that $keyed now contains your array for $keyed['google'] and the others.
Add or remove from the google|twitter|facebook|instagram|weibo to have a |another where you want to have more or less support for different sites.
It's not very scalable, and if the domain doesn't match a key you want to use, then in this case I've set it to create a key called notfound- with the original array key. (I've added badmedia.com to the list to demonstrate it.). You also run the risk of having a conflict where someone might be smart and have their Facebook username as "nottwitter" which will technically match "twitter"
So what you might want to consider rather than relying on the domain to provide your key for you, to keep a regex match for each full domain name. You could store these regex queries against the key you wanted to use, and nest your two loops to find a match...
For example:
$socialMedia = [
'facebook' => '/^(https?:\/\/)?(www\.)?facebook.com\/[a-zA-Z0-9(\.\?)?]/',
]
foreach ($array as $url) {
foreach ($socialMedia as $key => $regex) {
if (preg_match($regex, $url)) {
$keyed[$key] = $url;
}
}
}
(Shoutout to https://gist.github.com/atomicpages/4619196 for the full FB domain regex)
For very small sets (which I imagine you're dealing with at any one time) this would scale slightly better and give you a better result... It also rejects and removes any you don't support, but you would need to catch those separately.
For larger sets you probably want to look at how you collect the urls in the first place... Rather than accept any list, maybe have the form or API call you're receiving these from state which one it is on the way in.