What are the methods to convert PHP to strings?

1. Wrap the variables with double quotation marks or single quotation marks.

$var = 123;
$str = "This is a string with number $var";

1. Use the dot operator (.) to concatenate strings and variables.

$var = 123;
$str = "This is a string with number " . $var;

1. Use the sprintf function.

$var = 123;
$str = sprintf("This is a string with number %d", $var);

1. Utilize the implode function

$arr = array('Hello', 'World');
$str = implode(' ', $arr);

1. Utilize the json_encode function

$arr = array('Hello', 'World');
$str = json_encode($arr);

1. Use the serialize function.

$arr = array('Hello', 'World');
$str = serialize($arr);