how can I implement a line break in a variable in php?
You can use nl2br function of php:
$a = "apple \r\n orange \r\n banana";
echo nl2br($a);
Break tag would do that job
<?php
$str = "Hello world!";
echo $str;
echo "<br>What a nice day!";
?>
output:
Hello world!
What a nice day!
So in your case, it will be $a = "apple <br> orange <br> banana"; echo $a