PHP Foreach inside variable with equals - php

Question

I have a variable that equals some simple data as shown below
$var = 'hello names here how are yous?';
what i wish to achieve is have a foreach loop inside the $var but i have tried various ways with just no luck, always throwing errors.
Below is somewhat what i what to do.
$var = 'hello '.foreach($datas as $data) { echo $data }.' how are yous?';
echo $var;
which would output - hello Mike Daniel Steve how are yous?
any help appreciated.
======EDIT========
im trying to write to file the looped contents with below code.
$datas = 'Name, Name2, Name4';
$var = ''.foreach($datas as $data) { echo $data }.'
$default_file = 'media/default.php';
$default_file_handle = fopen($default_file, 'w') or die('Cannot open file: '.$default_file);
$default_data = '
'.$var.'//each value to be a new line
Name2 //example
Name4 //example
etc
';
fwrite($default_file_handle, $default_data);
so basically im write to file each value in the loop to a new line. I can write just normal content but getting a loop in their im struggling with

Answer 1

$var = 'hello';
foreach($datas as $data) {
$var .= ' '.$data.' ';
}
$var .= ' how are you?';
echo $var;
that should do it

Answer 2

$arr = array("Mike", "John");
echo "Hello " . implode(" ", $arr) . ", how are you?";
implode is your friend. Implode joins array elements together into one single string. The separator between each array element is the first parameter - in this case a blank.

Answer 3

You can use implode:
$var = 'hello '.implode(' ', $datas) .' how are yous?';
echo $var;

Answer 4

To achieve this you either have to insert the foreach loop like this:
echo "hello ";
foreach($datas as $data) {
echo $data;
}
echo " how are you?";
or you can use an extra variable and the implode method:
$dataString = implode(" ", $datas);
echo "hello " . $dataString . " how are you?";

Answer 5

You can do this following way.
<?php
$data = array('Mike Daniel','john doe');
foreach ($data as $value) {
$result = 'hello '. $value. ' how are you?'. '</br>';
echo $result;
}