String splitting function in PHP

First look at the definition of two methods:

Function prototype: Array split (String $pattern, string $string [, int $limit])

Function prototype: array explode (string $separator, string $string [, int $limit])

At first glance there is no difference, it seems that the function is the same.

Note that the first parameter of the two function is string $pattern and string separator, one is the $pattern description is a regular string, and the other is $separator is a normal string.

$test = End (Explode ('. ', ' abc.txt '));
echo $test;//output txt

Into:

Test1 = End (Split ('. ', ' abc.txt '));

echo $test 1;//no Output

The correct way to use split is to add escape symbols

$test 1 = end (Split (' \. ', ' abc.txt '));
echo $test 1;//output txt

String splitting function in PHP