How to echo or print arrays in PHP

Array content:

If you have an array, but you don't know what does it contain then you can use print_r() function. The function displays information about a variable in a way that's readable by humans.

Echo array:

If you have the most basic array you can use foreach to echo it. You can also echo key names.

Source code viewer
// First example:
$a = array ('a', 'b', 'c', 'd');
foreach ($a as $var)
	echo $var;
// Result: abcd
 
// Second example:
$a = array('key1' => 'a', 'key2' => 'b', 'key3' => 'c', 'key4' => 'd');
foreach ($a as key => $var)
	echo 'key: '.$key.' value: '.$var.'<br />';
// Result in parsed html will be:
// key: key1 value: a
// key: key2 value: b
// key: key3 value: c
// key: key4 value: d
Programming Language: PHP

Echo array as list:

You can also create lists out of arrays. Example code:

Source code viewer
$a = array ('a', 'b', 'c', 'd');
 
echo '<ul>';
foreach ($a as $var)
	echo '<li>'.$var.'</li>';
echo '</ul>';
Programming Language: PHP

Result:

• a
• b
• c
• d