The difference between explode and split in php

$test = end(explode('.', 'abc.txt'));
echo $test;//output txt

and replace it with:

$test1 = end(split('.','abc.txt'));
echo $test1;//no output

use split The correct approach is: add escape symbols

$test1 = end(split('.','abc.txt'));
echo $test1;//output txt

Remarks : The "." symbol is a keyword in regular expressions, so split is invalid, but explode is valid.