<?php
//first example
$array = array('1', '2', '3', '4', '5', '6', '7', '8', '9', '10');
echo join('<br>', $array);
//first example (result)
/*
1
2
3
4
5
6
7
8
9
10
*/
//second example
$arr[] = '1a';
$arr[] = '2b';
$arr[] = '3c';
$arr[] = '4d';
$arr[] = '5e';
$arr[] = '6f';
$arr[] = '7g';
$arr[] = '8h';
$arr[] = '9i';
$arr[] = '10j';
echo join('<br>', $arr);
//second example (result)
/*
1a
2b
3c
4d
5e
6f
7g
8h
9i
10j
*/