SQL Query returns null? - php

Question

I want to get all names of my products and push them into an array. If I use the SQL Query (SELECT name FROM wp_all_import_xml GROUP BY name) in phpmyadmin I get this:
But if I use the query in my script I get this array:
array (
0 => NULL,
1 => NULL,
2 => NULL,
3 => NULL,
4 => NULL,
...)
So, the query must return null. But why? - Everything is correct!
I do not get any connection error or query error... Where is my error?
I already tried to decode the strings and I also tried $myTitles[] = $tmp. But it also doesn't work... Any ideas?
And because everything in the $myTitles array is null, the script always enters the if(!(in_array($title, $myTitles) condition and I cannot execute what I actual want... I can only execute this, if the array and the condition is really true!
<?php
if ( ! defined('ABSPATH') ) {
// Set up WordPress environment
require_once( dirname( __FILE__ ) . '/wp-load.php' );
}
unlink('deleteOldProducts.txt');
$myfile = fopen('deleteOldProducts.txt', "w");
$database_gk = new mysqli("localhost", "censored", "censored", "censored");
$database_jt = new mysqli("localhost", "censored", "censored", "censored");
$myTitles = array();
$string = "";
if($database_jt->connect_errno){
$string .= "+++Couldn't connect to database_jt!+++\n\n");
}
if($database_gk->connect_errno){
$string .= "+++Couldn't connect to database_gk!+++\n\n");
}
$values_jt = $database_jt->query("SELECT name FROM `wp_all_import_xml` GROUP BY name");
$string .= $database_jt->error . "\n";
while($rowj = $values_jt->fetch_assoc()){
$tmp = utf8_encode($row["name"]);
array_push($myTitles, $tmp);
$tmp = null;
}
$values_gk = $database_gk->query("SELECT `post_title` FROM `fWR6qIN_posts` where post_type = 'product' AND post_status = 'publish' GROUP BY `post_title`");
$string .= $database_gk->error . "\n";
$string .= "+++ Start of Check +++\n\nMein Array:\n" . var_export($myTitles, true) . "\n\n";
$i = 1;
while($row = $values_gk->fetch_assoc()){
$title = utf8_decode($row["post_title"]);
if(!(in_array($title, $myTitles))){
$string .= $i . ":\t" . $title . "\n";
$i = $i + 1;
}
$title = null;
}
$string .= "\n +++ End of Check! +++";
fwrite($myfile, $string);
fclose($myfile);
?>
Greetings and Thank You!

Answer 1

Your while isn't correct. On while you are using $rowj but on array_push you are using $row. You can try the following code instead:
while($row = $values_jt->fetch_assoc()) {
$myTitles[] = utf8_encode($row["name"]);
}
Note: If you use array_push() to add one element to the array it's better to use $array[] = because in that way there is no overhead of calling a function.
http://php.net/manual/en/function.array-push.php