在PHP中访问多维数组中的元素
问题描述：
I am trying to associate every subdomain, from a list, with its main domain name and I am doing this like so:
<?php
$main_domains = ['example.co.uk','example.com','example.org'];
$subdomains = ['sub.example.com','ftp.example.org','ftp.example.co.uk','mail.example.com'];
$results = [];
foreach ($subdomains as $subdomain) {
foreach ($main_domains as $domain) {
if (strpos($subdomain, $domain) !== false) {
$results[$domain][] = $subdomain;
continue;
}
}
}
Where in the end $results contains the following:
array(3) {
["example.com"]=>
array(2) {
[0]=>
string(15) "sub.example.com"
[1]=>
string(16) "mail.example.com"
}
["example.org"]=>
array(1) {
[0]=>
string(15) "ftp.example.org"
}
["example.co.uk"]=>
array(1) {
[0]=>
string(17) "ftp.example.co.uk"
}
}
However, I would now like to echo out the information like so:
<main domain> <sub domain>
<main domain> <sub domain>
...
i.e:
example.com sub.example.com
example.com mail.example.com
example.org ftp.example.org
example.co.uk ftp.example.co.uk
How can I do that?
答
most importantly is to set up the initial structure.
$dom=array('example.co.uk'=>array('ftp.example.co.uk','zzz.example.co.uk'));
foreach($dom as $domain=>$sub){
foreach($sub as $s){
echo $domain.' '.$s."
";
}
}
output:
example.co.uk ftp.example.co.uk
example.co.uk zzz.example.co.uk
exacly what you asked for.