PHP: foreach loop

<?php
$myArray = array('guitar', 'piano', 'saxophone', 'trumpet', 'violin');

// The easiest way to loop through an array is with a foreach loop
foreach ($myArray as $item) {
    echo $item . PHP_EOL;
}
/*
Prints:
guitar
piano
saxophone
trumpet
violin
*/

// You can also get the current key in a foreach loop
foreach ($myArray as $key => $item) {
    echo $key . ' => ' . $item . PHP_EOL;
}
/*
Prints:
0 => guitar
1 => piano
2 => saxophone
3 => trumpet
4 => violin
*/

// You can also get a reference to the individual items - but be careful to unset $item afterwards
foreach ($myArray as &$item) {
    // modify $item somehow
    $item .= ' player';
}

unset($item); // unset $item to avoid unexpected behaviour

var_dump($myArray);
/*
Prints:
array(5) {
  [0]=>
  string(13) "guitar player"
  [1]=>
  string(12) "piano player"
  [2]=>
  string(16) "saxophone player"
  [3]=>
  string(14) "trumpet player"
  [4]=>
  string(13) "violin player"
}
*/