Print array separating values in groups with same substring - php

Question

I have an array with a list of domains sorted by domain extensions, like:
values[0] = "programming.ca";
values[1] = "Stackoverflow.ca";
values[2] = "question.com";
values[3] = "answers.com";
values[4] = "AASystems.com";
values[5] = "test.net";
values[6] = "hello.net";
values[7] = "apple.nl";
values[8] = "table.org";
values[9] = "demo.org";
How do I print this array, while automatically grouping it in groups with same domain extension and separated by the line break <br />, so the result will look like this?
programming.ca
Stackoverflow.ca
question.com
answers.com
AASystems.com
test.net
hello.net
apple.nl
table.org
demo.org

Answer 1

Try this.
$ext = "";
for($i = 0; $i < count($values); $i++) {
$parts = explode('.', $values[$i]);
$e = $parts[count($parts) - 1];
if(strcmp($parts[count($parts) - 1], $ext) != 0) {
$ext = $e;
echo '<br/>';
}
echo $values[$i].'<br/>';
}

Answer 2

try this if domain names are in order of domain extensions,
$values[0] = "programming.ca";
$values[1] = "Stackoverflow.ca";
$values[2] = "question.com";
$values[3] = "answers.com";
$values[4] = "AASystems.com";
$values[5] = "test.net";
$values[6] = "hello.net";
$values[7] = "apple.nl";
$values[8] = "table.org";
$values[9] = "demo.org";
$prev_ext = "";
foreach($values as $domain_name)
{
$arr_temp = explode(".", $domain_name);
$domain_ext = $arr_temp[1];
if($prev_ext!=$domain_ext)
{
echo '<br/></br/><br/>';
}
echo $domain_name."<br/>";
$prev_ext = $domain_ext;
}
UPDATE : 2
try this if domain names are not in order of their extensions
$values[0] = "programming.ca";
$values[1] = "AASystems.com";
$values[2] = "demo.org";
$values[3] = "answers.com";
$values[4] = "Stackoverflow.ca";
$values[5] = "test.net";
$values[6] = "hello.net";
$values[7] = "apple.nl";
$values[8] = "table.org";
$values[9] = "question.com";
$arr_domains = array();
foreach($values as $domain_name)
{
$arr_temp = explode(".", $domain_name);
$domain_ext = $arr_temp[1];
$arr_domains[$domain_ext][] = $domain_name;
}
foreach($arr_domains as $ext=>$arr_name)
{
echo "<br/><br/><b>".$ext."</b><br/>";
foreach($arr_name as $name)
{
echo $name."<br/>";
}
}

Answer 3

I edited to hopefully make naming clearer. Basically, explode each domain to get name.extension, then store each name in a dictionary of (extension,domainArray) pairs, then foreach entry in the dictionary, grab the domainArray, then foreach name in the domainArray, echo out the domain name . extension, then a line break, then another line break for every dictionary entry.
<?php
$values[0] = "programming.ca";
$values[1] = "Stackoverflow.ca";
$values[2] = "question.com";
$values[3] = "answers.com";
$values[4] = "AASystems.com";
$values[5] = "test.net";
$values[6] = "hello.net";
$values[7] = "apple.nl";
$values[8] = "table.org";
$values[9] = "demo.org";
$domainsList = [];
foreach ($values as $val) {
$valArr = explode(".", $val);
$name = $valArr[0];
$extension = $valArr[1];
if (isset($domainsList[$extension])) {
$domainsList[$extension][] = $name;
} else {
$domainsList[$extension] = [$name];
}
}
foreach ($domainsList as $extension => $domains) {
foreach ($domains as $domain) {
echo $domain . "." . $extension . "<br />";
}
echo "<br />";
}

Answer 4

Try this code.
$domian = array(
"programming.ca",
"Stackoverflow.ca",
"question.com",
"answers.com",
"AASystems.com",
"test.net",
"hello.net",
"apple.nl",
"table.org",
"demo.org");
$result;
foreach ($domian as $value) {
$arr = explode('.', $value);
$result[$arr[1]][] = $value;
}
print_r($result);