which key will not be displayed from the following code block..., PHP Arrays, PHP

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Question:Which key will not be displayed from the following code block?
<?php

$array = array('a' => 'John',
 'b' => 'Coggeshall',
 'c' => array('d' => 'John',
 'e' => 'Smith'));

function display($item, $key) {
	print "$key => $item\n";
}

array_walk_recursive($array, "display");

?>

A d 
B c 
C b 
D a 
E They all will be displayed

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Question:Which key will not be displayed from the following code block?<?php$array = array('a' => 'John', 'b' => 'Coggeshall', 'c' => array('d' => 'John', 'e' => 'Smith'));function display($item, $key) { print "$key => $item\n";}array_walk_recursive($array, "display");?>

A d

B c

C b

D a

E They all will be displayed

B

Question:Which key will not be displayed from the following code block?

<?php

$array = array('a' => 'John',
'b' => 'Coggeshall',
'c' => array('d' => 'John',
'e' => 'Smith'));

function display($item, $key) {
print "$key => $item\n";
}

array_walk_recursive($array, "display");

?>