PHP: populate MySQL table with result of anagram creation - php

Question

I am trying to populate a MySQL table with the result of a function to create anagrams from a given word. There is simply no result at all. I even do not get an error message.
<?php
//connect to your database
$conn = mysqli_connect("localhost","dbuser","3423423sfdfsdf","mydb");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$input = $trimmed;
function string_getpermutations($prefix, $characters, &$permutations)
{
if (count($characters) == 1)
$permutations[] = $prefix . array_pop($characters);
else
{
for ($i = 0; $i < count($characters); $i++)
{
$tmp = $characters;
unset($tmp[$i]);
string_getpermutations($prefix . $characters[$i], array_values($tmp), $permutations);
}
}
}
$characters = array();
for ($i = 0; $i < strlen($input); $i++)
$characters[] = $input[$i];
$permutations = array();
string_getpermutations("", $characters, $permutations);
foreach($permutations as $result) {echo $result,'<br>';}
foreach($permutations as $result) {mysqli_query($conn,"INSERT INTO tempanagram (anagram) VALUES ('$result')");}
?>

Answer 1

You can also use mysqli, but best solution is using some query builders.
Add to your code error reporting for PHP and MYSQL
<?php
error_reporting(E_ALL);
ini_set('display_errors', true)
mysql_query($sql, $conn) or die('ERROR: '.mysqli_error($conn));
More info in http://php.net/manual/en/mysqli.error.php
You can optimize your code to make 1 insert query by using bulk insert, something like this:
<?php
$sql = 'INSERT INTO tempanagram (anagram) VALUES ("'.join('"),("', $permutations).'")';

Answer 2

I got the solution:
Instead of foreach($permutations as $result) {mysqli_query("INSERT INTO tempanagram (anagram) VALUES ('$result')");}
I had to write:
foreach($permutations as $result) {mysqli_query($conn,"INSERT INTO tempanagram (anagram) VALUES ('$result')");}
Otherwise it is apparently not clear that I am referring to that connection.
All the other hints are very valuable. Thanks very much to everybody.