Finding string in array [duplicate] - php

Question

This question already has answers here:
PHP multidimensional array search by value
(23 answers)
Closed 5 years ago.
Alright, so I'm querying the DB and generating an array from a list of IP addresses:
$q = 'SELECT ip FROM proxy';
$r = mysqli_fetch_all($con->query($q), MYSQLI_ASSOC);
Array returned looks like this:
Array
(
[0] => Array
(
[ip] => 1.202.244.222
)
[1] => Array
(
[ip] => 1.226.238.136
)
[2] => Array
(
[ip] => 1.228.231.247
)
[3] => Array
(
[ip] => 1.238.106.137
)
[4] => Array
(
[ip] => 1.238.155.191
)
But if I want to find say the first or any IP in the above list, for some reason it doesn't find anything:
$ip = "1.202.244.222";
if(in_array($ip,$r)) {
echo "gotcha";
}
What am I doing wrong here?

Answer 1

Got confused by the array within array stuff which I didn't notice at first.
Thanks to Zeth's pointers, I got it to work by collapsing the arrays into one by adding:
$r0 = array_column($r, 'ip');
And then:
if(in_array($ip,$r0)) {
echo "gotcha";
}

Answer 2

It's an array of arrays... Collapse the thing, and then it'll work. There are a couple of options here: How to "flatten" a multi-dimensional array to simple one in PHP?

Answer 3

The most flexible approach for such situations is to use a user defined comparison function:
<?php
$needle = '1.202.244.222';
$haystack = [
[
'ip' => '1.202.244.222'
],
[
'ip' => '1.226.238.136'
],
[
'ip' => '1.228.231.247'
],
[
'ip' => '1.238.106.137'
],
[
'ip' => '1.238.155.191'
]
];
$result = array_filter($haystack, function($entry) use ($needle) {
return isset($entry['ip']) && $needle === $entry['ip'];
});
print_r($result);
The output of above code obviously is:
Array
(
[0] => Array
(
[ip] => 1.202.244.222
)
)

Answer 4

Your Array condition was wrong.
$ip_find = '1.202.244.222';
$ip_values = [
[
'ip' => '1.202.244.222'
],
[
'ip' => '1.226.238.136'
],
[
'ip' => '1.228.231.247'
],
[
'ip' => '1.238.106.137'
],
[
'ip' => '1.238.155.191'
]
];
foreach ($ip_values as $key => $value) {
foreach ($value as $key => $ip) {
if ($ip==$ip_find) {
echo $ip." Gocha";
break;
}
}
}

Answer 5

You can do it using foreach:
$r = [
[
'ip' => '1.202.244.222'
],
[
'ip' => '1.226.238.136'
],
[
'ip' => '1.228.231.247'
],
[
'ip' => '1.238.106.137'
],
[
'ip' => '1.238.155.191'
]
];
$ip = "1.202.244.222";
foreach($r as $elem)
{
if($elem['ip'] == $ip)
{
echo "gotcha";
break;
}
}