How to convert an array to a string - php

Question

What I want is to convert an array to a string so I can display it on my websites. I made a query to select the values id, title, date, auteur. When i use my function I made for this, I get the following error:
Notice: Array to string conversion in /Applications/MAMP/htdocs/beheer/index.php on line 444
Array.
The function is as following:
<?php
include ('connect/connect.php');
function getListContentMain() {
global $con;
$dbname = 'content';
mysqli_select_db($con,$dbname);
$q = "SELECT * FROM main LIMIT 5";
$result = mysqli_query($con,$q);
$ListContentMainData = array();
while($row = mysqli_fetch_array($result)) {
echo $row['id'];
echo $row['title'];
echo $row['date'];
echo $row['auteur'];
}
$ListContentMainData[] = $row;
return $ListContentMainData;
}
?>

Answer 1

implode it up
return implode(' ',$ListContentMainData);
You are returning an array but you are trying to print it as a normal string , so in that case you need to implode it (array) and convert it to a string.
Rewrite like..
$ListContentMainData = array();
while($row = mysqli_fetch_array($result)) {
echo $row['id'];
echo $row['title'];
echo $row['date'];
echo $row['auteur'];
$ListContentMainData[]=$row['id'];
$ListContentMainData[]=$row['title'];
$ListContentMainData[]=$row['date'];
$ListContentMainData[]=$row['auteur'];
}
return implode(' ',$ListContentMainData);

Answer 2

This will make an array of strings, one for each row in the table with columns separated by a space (you could change that in the implode statement).
function getListContentMain() {
global $con;
$dbname = 'content';
mysqli_select_db($con,$dbname);
$q = "SELECT * FROM main LIMIT 5";
$result = mysqli_query($con,$q);
$ListContentMainData = array();
while($row = mysqli_fetch_array($result)) {
echo $row['id'];
echo $row['title'];
echo $row['date'];
echo $row['auteur'];
array_push($ListContentMainData, implode(' ', $row));
}
return $ListContentMainData;
}