what will be the output of following script php result..., Arrays, Zend Certification

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Question:What will be the output of the following script?<?php
$result = '';
function glue ($val){
  global $result;
  $result .= $val;
}
$array = array ('a', 'b', 'c', 'd');
array_walk ($array, 'glue');
echo $result;
?>

A abcd 
B glue 
C Array 
D abcdabcd 
E none

/15

+ AnswerA

+ ExplanationThe array_walk function executes a given callback function for every element of an array. Therefore, this script will cause the glue function to concatenate all the elements of the array and output abcd.

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Question:What will be the output of the following script?<?php $result = ''; function glue ($val){ global $result; $result .= $val; } $array = array ('a', 'b', 'c', 'd'); array_walk ($array, 'glue'); echo $result; ?>

A abcd

B glue

C Array

D abcdabcd

E none

A

Question:What will be the output of the following script?
<?php $result = ''; function glue ($val){ global $result; $result .= $val; } $array = array ('a', 'b', 'c', 'd'); array_walk ($array, 'glue'); echo $result; ?>