PHP Array, foreach and =>

Hi,

Can anyone tell me what's the purpose and meaning of "=>" in for each loop?

what does => reference between $key & $value ($array as $key => $value)
particularly, take the following example code

 

please check this link http://www.php.net/manual/en/language.types.array.php
array format:

Array ( key => value)

Code (markup):

array sample:

Array (
	'foo' => 'bar',
	'hello' => 'world'
)

Code (markup):

$key : get the value key,
$value : get value.
you can use

foreach ($array as $row)

Code (markup):

or

foreach (array as $key => $row)

Code (markup):

 

If you need to use the key name, then use =>, if you just need to get value of array then you don't need it.