$numbers = range(0, 9);
shuffle($numbers);
foreach ($numbers as $number) {
 echo $number;
}

<?php
 $numbers = range(0, 9);
 foreach($numbers as $value)
   echo $value." ";
//Will output  0 1 2 3 4 5 6 7 8  9
?>

<?php
 $numbers = range(0, 9);
 foreach($numbers as $value)
   echo $value." ";
//Will output  0 1 2 3 4 5 6 7 8  9
?>

<?php
 $testData= array('Test1', 'Test2', 'Test3');
 print_r(array_reverse($testData)); 
 //Array ( [0] => Test3 [1] => Test2 [2] => Test1 )
?>

<?php
 $testData= array('Test1', 'Test2', 'Test3');
 echo end($testData); // Test3
?>

<?php
// Example 1
$testValues  = "test1 test2 test3 test4 test5";
$testArray = explode(" ", $testValues);
print_r($testArray);
//Array ( [0] => test1 [1] => test2 [2] => test3 [3] => test4 [4] => test5 )

// Example 2
$testValues  = "test1,test2,test3,test4,test5";
$testArray = explode(",", $testValues);
print_r($testArray);
//Array ( [0] => test1 [1] => test2 [2] => test3 [3] => test4 [4] => test5 )
?>

<?php
 $testArray = array('Test1', 'Test2', 'Test3');
 $testString = implode(",", $testArray);
 echo $testString; // Test1,Test2,Test3
?>

<?php
 $testArray = array('Test1', 'Test2', '');
 print_r( array_filter($testArray));
 //  Array ( [0] => Test1 [1] => Test2 )
?>