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Splitting and converting a string to an array and vice versa.
The code will return an array with 2 elements. 
$str = "Hello world";
print_r (explode(" ",$str));
Return: 
Array ( [0] => Hello [1] => world )
The code will return a string containing the elements of the array. 
$arr = array('Hello','World!');
echo implode(" ",$arr);
Return: 
Hello World!
by saba chankvetadze
3 years ago
PHP
PHP official doc
0
Pro tip: use ```triple backticks around text``` to write in code fences