<?php
highlight_file(__FILE__);
echo '<hr>';
$a = array(2,4);        echo '$a = <i>'. var_export($a,1).'</i><br />';
$b = array(3,12);       echo '$b = <i>'. var_export($b,1).'</i><br />';
$c=array_merge($a,$b);  echo '$c = <i>'. var_export($c,1).'</i><br />';
$d=$a+$b;               echo '$d = <i>'. var_export($d,1).'</i><br />';
echo '<hr>';
$a = array('a' => 2,'b' => 4);  echo '$a = <i>'. var_export($a,1).'</i><br />';
$b = array('c' => 3,'d' => 12); echo '$b = <i>'. var_export($b,1).'</i><br />';
$c=array_merge($a,$b);          echo '$c = <i>'. var_export($c,1).'</i><br />';
$d=$a+$b;                       echo '$d = <i>'. var_export($d,1).'</i><br />';
echo '<hr>';
$a = array('0' => 2,'1' => 4);  echo '$a = <i>'. var_export($a,1).'</i><br />';
$b = array('2' => 3,'3' => 12); echo '$b = <i>'. var_export($b,1).'</i><br />';
$c=array_merge($a,$b);          echo '$c = <i>'. var_export($c,1).'</i><br />';
$d=$a+$b;                       echo '$d = <i>'. var_export($d,1).'</i><br />';

?>
$a = array ( 0 => 2, 1 => 4, )
$b = array ( 0 => 3, 1 => 12, )
$c = array ( 0 => 2, 1 => 4, 2 => 3, 3 => 12, )
$d = array ( 0 => 2, 1 => 4, )
$a = array ( 'a' => 2, 'b' => 4, )
$b = array ( 'c' => 3, 'd' => 12, )
$c = array ( 'a' => 2, 'b' => 4, 'c' => 3, 'd' => 12, )
$d = array ( 'a' => 2, 'b' => 4, 'c' => 3, 'd' => 12, )
$a = array ( 0 => 2, 1 => 4, )
$b = array ( 2 => 3, 3 => 12, )
$c = array ( 0 => 2, 1 => 4, 2 => 3, 3 => 12, )
$d = array ( 0 => 2, 1 => 4, 2 => 3, 3 => 12, )