Split String or String tokenization

<?php

$sentence ="Hello World, My name is Jimmy";
echo "split using explode<br>";
$split1= explode(" ",$sentence);
print_r($split1);
echo "<br>Join Splitted Sentence<br>";
$join1=join(" ",$split1);
echo $join1;
echo "<br>Join splitted sentence using implode<br>";
$join2 = implode(" ",$split1);
echo $join2;
echo "<br>Split string using multiple delimeter<br>";
$split2 = strtok($sentence," ,");

while ($split2 !== false){
    echo $split2."<br>";
    $split2=strtok(" ,");
}
print_r($split2);

echo "<br>Split string using regular expression <br>";

$split3= preg_split("/ |,/",$sentence);
print_r($split3);

echo "<br>Split \"Hello World\" in characters<br>";
echo <<<MyText
Split "Hello WOrld" in Characters <br>
MyText;
$split4 = str_split("Hello World");
print_r($split4);

?>

split using explode
Array ( [0] => Hello [1] => World, [2] => My [3] => name [4] => is [5] => Jimmy )
Join Splitted Sentence
Hello World, My name is Jimmy
Join splitted sentence using implode
Hello World, My name is Jimmy
Split string using multiple delimeter
Hello
World
My
name
is
Jimmy

Split string using regular expression
Array ( [0] => Hello [1] => World [2] => [3] => My [4] => name [5] => is [6] => Jimmy )
Split "Hello World" in characters
Split "Hello WOrld" in Characters
Array ( [0] => H [1] => e [2] => l [3] => l [4] => o [5] => [6] => W [7] => o [8] => r [9] => l [10] => d )