#### String concatenation in php
Exploring the trade-offs of various levels of granularity.

##### The string concatenation operator
Strings can be concatenated with `.`

`$string = $string1 . $string2 . $string3;`

##### String Assignment

`.=`

`$string .= $string1;`

This is the equivalent to
`$string = $string . $string1;`

##### Arrays with delimiters

```
/**
 * @var String
 * The default delimiter value is an empty string.
 * We can set a new default delimiter here.
 */

$delimiter = ' ';
$array_of_words = ['hello', 'world'];
$string = implode($delimiter, $array_of_words);
```

##### String indexes

This approach provides granularity but increases complexity.

```
foreach ($string1 as $character) {
	if ($character > $string2[0]) {
		$string .= $character
	} else {
		$string .= $string2[0];
	}
}
```

```
function parseString($index) use ($string) {
    return $string[$index] === $filter;
}
```