PHP counting MYSQL rows that contain the same value in many columns - php

Question

Here is the content of my table:
How to count all names in different table cells to get a result like this?
Bob-7
Alex-3
Ivan-5
Nina-5
.........
With this code:
<?php
$q= mysqli_query($db, 'SELECT * FROM names');
while ($all = mysqli_fetch_array($q)) {
$k1= $all['Name1'];
$k2= $all['Name2'];
$k3= $all['Name3'];
$k4= $all['Name4'];
$k5= $all['Name5'];
$k6= $all['Name6'];
$arr[]= $k1;
$total_values = array_count_values($arr);
}
foreach ($total_values as $key => $value) {
echo $key .'-'. $value .'<br>';
}
My output result is:
Bob-3
Alex-1
Ivan-1
Nina-2
When I change my code to:
<?php
$q= mysqli_query($db, 'SELECT * FROM names');
while ($all = mysqli_fetch_array($q)) {
$k1= $all['Name1'];
$k2= $all['Name2'];
$k3= $all['Name3'];
$k4= $all['Name4'];
$k5= $all['Name5'];
$k6= $all['Name6'];
$arr=array($k1, $k2);
$total_values = array_count_values($arr);
foreach ($total_values as $key => $value) {
echo $key .'-'. $value .'<br>';
}
}
My output result is:
Bob-1
Alex-1
Ivan-1
Nina-1
Nina-1
Bob-1
Bob-1
Ivan-1
Nina-1
Nina-1
.......
What is wrong and what I have to do to add $k2, $k3....$k6 in the array $arr?

Answer 1

This will count the number of occurences for a single name:
$q= mysqli_query($db, 'SELECT * FROM names');
$arr = array();
// 1) loop through rows
while ($all = mysqli_fetch_array($q, MYSQLI_NUM)) {
// 2) loop through cells in a row
foreach($all as $val) {
// 3) 'roll out' the values into a one-dimensional array
if(empty($val)) { continue; } // if you don't want to count empty cells
$arr[] = $val;
}
}
// 4) count the number of occurences
$names_qty = array_count_values($arr);
// optional loop that shows the results
foreach($names_qty as $name=>$qty) {
echo $name.'-'.$qty.'<br />';
}
The benefit of this solution is that you call the counting function only once and not in every iteration.

Answer 2

You have to accumulate data in a loop and print it after all data is processed.
$total = array();
$result = mysqli_query($db, 'SELECT * FROM names', MYSQLI_USE_RESULT);
while (mysqli_fetch_assoc($result) as $row) {
foreach ($row as $col => $value)
total[$col]++;
}
}
print_r($total);

Answer 3

This code is tested and should do the trick.
<?php
$arr = array();
$q = mysqli_query($db, 'SELECT * FROM names');
while ($all = mysqli_fetch_assoc($q)) {
foreach($all as $val) {
if(empty($val)) {
continue;
}
// saves all names with the name as key
$arr[$val][] = $val;
}
}
// Output
foreach($arr as $k => $v) {
// count how many times the name was pushed into the array
echo $k.' - '. count($v);
}