<?php show_source(end(explode('/',$_SERVER['PHP_SELF']))); echo "<hr>"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
    <title>Convert a String into an Array</title>
</head>
<body>
<?php
    $sentence 
'This is a short sentence.';

    
$words explode(' '$sentence);

    
print_r($words);
?>
</body>
</html>

Convert a String into an Array Array ( [0] => This [1] => is [2] => a [3] => short [4] => sentence. )