Check an array value exists another array key in PHP

Question

I have two arrays with the following values,

First Array:

Array
(
    [Strongly Agree] => 100
)

Second Array:

Array
(
    [0] => Strongly Agree
    [1] => Agree
    [2] => Neither Agree or Disagree
    [3] => Strongly Disagree
)

I need the output should like this,

Array (
        [0] => 100
        [1] => 0
        [2] => 0
        [3] => 0
)

GautamD31 · Accepted Answer · 2014-03-04 11:17:41Z

2

Try like

foreach($array2 as $key => $value) {
   $temp = array_key_exists($value, $array2) ? $array1[$value] : 0;
   $newArr[$key] = $temp;
}

edited Mar 4, 2014 at 11:17

answered Mar 4, 2014 at 11:10

GautamD31

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4 Comments

Jon Over a year ago

This needs improvement desperately. For one it will produce null instead of zeroes, and it will also emit notices. Don't use code like this.

GautamD31 Over a year ago

@Jon sorry for late.Actually I realized after I submit my ans.Thanks for the suggestion

Jon Over a year ago

@Gautam3164: Ok, but why also change $array1 in the process?

GautamD31 Over a year ago

@Jon ;-) .Ok edited.Just a glance that I considered his need.I think no need other than that.

ffflabs · Accepted Answer · 2014-03-04 11:15:22Z

2

array key exists won't trigger notices

$sample = array('Strongly Agree' => 100);
$alternatives = array(   'Strongly Agree',    'Agree',    'Neither Agree or Disagree',    'Strongly Disagree');
$output=array();
foreach($alternatives as $alternative) {
    $output[$alternative] = array_key_exists($alternative, $sample)? $sample[$alternative]:0;
}

print_r($output);

answered Mar 4, 2014 at 11:15

ffflabs

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Comments

Nouphal.M · Accepted Answer · 2014-03-04 11:37:46Z

0

Try

$arr2 = array_merge(array_fill_keys($arr2, 0), $arr1);

See demo here

answered Mar 4, 2014 at 11:37

Nouphal.M

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