Search in array DNS entry - php

Question

I have seen so many answers but i just can't get it to work.
I want to check if there is a (partial) value in the array.
//Get DNS records
$result = dns_get_record("php.net", DNS_ALL);
print_r($result);
//If the value php-smtp3.php.net is found, echo it
if (in_array("php-smtp3.php.net", $result )) {
echo "Found!";
}
added : json_encoded $result, from my network
[
{
"host" : "php.net" ,
"class" : "IN" ,
"ttl" : 375 ,
"type" : "A" ,
"ip" : "208.43.231.9"
} ,
{
"host" : "php.net" ,
"class" : "IN" ,
"ttl" : 375 ,
"type" : "NS" ,
"target" : "dns2.easydns.net"
}
]
Thank you all so much, i think i am almost there and sorry if i dont understand fully. This is what i have now:
$result = dns_get_record("php.net", DNS_ALL);
print_r($result);
$result = json_decode($result, true);
$result = array_filter($result, function($x) {
return in_array("smtp", $x, true);
//If in the array, no matter where, is "smtp" then echo "found" is what i am trying to achieve
echo "<h1>FOUND</h1>";
});
Update:
$result = dns_get_record("php.net", DNS_ALL);
$result = json_decode($data, true);
function process($data) {
foreach ($data as $key => $value) {
if (is_array($value)) {
return process($value);
}
if (is_string($value) && strpos($value,'smtp') !== false) {
echo "FOUND";
return true;
}
}
return false;
}
$result = array_filter($result, 'process');
I am trying both ways... so sorry you guys, i am stuck trying to get a response from the DNS entry for a simple string. The actual idea behind this is:
1) Check a DNS record for a domain
2) Check if there is a SPF record ANYWHERE
3) If so, just say "found SPF record"
$values = array_reduce(
dns_get_record("php.net", DNS_ALL),
function ($out, $item) {
return array_merge($out, array_values($item));
},
[]
);
var_dump(in_array("dns2.easydns.net", $values));
//Result is bool(true)

Answer 1

After using json_decode, your data returns a multi dimensional array where some arrays also contain an array.
What you might do if you want to check for a partial value so if the string contains a substring is to use strpos but you have to loop throug all the strings, also in the sub arrays.
Therefore you might use array_filter in combination with a recursive approach.
So for example if you want to look for the substring smtp3 you could use:
function process($data) {
foreach ($data as $key => $value) {
if (is_array($value)) {
return process($value);
}
if (is_string($value) && strpos($value,'smtp3') !== false) {
return true;
}
}
return false;
}
$result = array_filter($result, 'process');
print_r($result);
See the php demo

Answer 2

All you need to do is to flatten the result and search for a value, like this:
<?php
$values = array_reduce(
dns_get_record("php.net", DNS_ALL),
function ($out, $item) {
return array_merge($out, array_values($item));
},
[]
);
var_dump(in_array("dns2.easydns.net", $values));