php wordpress - retrieveing values from mysql table one by one - php

Question

I have been trying to retrieve data one by one from mysql table that I just created. Below Image has shown the table that includes the sample coupon codes and a field called "test" to specify if the code has been generated by users.
My goal is to retrieve coupon codes below "adidas" serially (arda10, arda11, arda12,...) and update the status of the coupon in test column after the coupon code is shown.
If the status in test column is 1, the code should not be shown to the users. Only codes with status 0 should be printed.
$kupon = $wpdb->get_results( 'SELECT * FROM `wp_kuponlar`', ARRAY_A);
echo $kupon[adidas];
Help please!

Answer 1

Am not sure what your question and what the error might be, but this is a better formating and way to go please ensure you adidas is qouted like the example I have below.
$kupon = $wpdb->get_results( 'SELECT * FROM wp_kuponlar', ARRAY_A);
foreach($kupon as $coupon){
echo $coupon['adidas'];
}
Extra tip
if the table is attached to wordpress db and not a totally different db, the better way to go is doing the following
$kupon = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}_kuponlar", ARRAY_A);
Based on Comment
$kupon = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}_kuponlar where status = 0 Orderby id ASC", ARRAY_A);
foreach($kupon as $coupon){
echo $coupon['adidas'];
}

Answer 2

Get results from wp database table use $wpdb->get_results() query something like this,
It gives you all your data with test status 0 or 1
<?php
global $wpdb;
$kupon = $wpdb->get_results(
$wpdb->prepare(
'SELECT * FROM wp_kuponlar'
), ARRAY_A
);
foreach ($kupon as $coupon) {
echo $coupon['adidas'];
}
but if you want to filter values for 0 only the change query as,
<?php
global $wpdb;
$kupon = $wpdb->get_results(
$wpdb->prepare(
'SELECT * FROM wp_kuponlar WHERE test = %d', 0
), ARRAY_A
);
foreach ($kupon as $coupon) {
echo $coupon['adidas'];
}
Find the result data set in order of coupons in ascending order with test status not 1,
<?php
global $wpdb;
$kupon = $wpdb->get_results(
$wpdb->prepare(
'SELECT * FROM wp_kuponlar WHERE test != 1 ORDER BY RIGHT(adidas,3)'
), ARRAY_A
);
// Now the resultset will be in order of ids
foreach ($kupon as $coupon) {
echo $coupon['adidas'];
}