Accessing a multidimensial array value

Question

I have an array below and I need to access the checkbox3 array and find out if it is set.

Something like this but it doesn't work:

<?php if(isset($fields['checkbox3']["One"])): ?>
    One is set
<?php endif; ?>

array(2) {
  ["checkbox2"]=>
  array(1) {
    [0]=>
    string(10) "Don't Show"
  }
  ["checkbox3"]=>
  array(5) {
    [0]=>
    string(3) "One"
    [1]=>
    string(3) "Two"
    [2]=>
    string(5) "Three"
    [3]=>
    string(4) "Four"
    [4]=>
    string(5) "Five"
  }
}

Mike Lewis · Accepted Answer · 2011-03-22 23:46:17Z

3

in_array("One", $fields["checkbox3"]);

Use in_array().

bool in_array ( mixed $needle , array $haystack [, bool $strict ] )

answered Mar 22, 2011 at 23:46

Mike Lewis

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1 Comment

Keith Over a year ago

Thanks Mike, you got it right quickest, so I'll accept your answer in 6 minutes

Mike Park · Accepted Answer · 2011-03-22 23:47:15Z

2

$fields['checkbox3']["One"] doesn't exist, rather "One" is the value of $fields['checkbox3'][0]

answered Mar 22, 2011 at 23:47

Mike Park

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Comments

mario · Accepted Answer · 2011-03-22 23:47:17Z

2

You want to use the in_array() function for that:

if (in_array("One", $fields["checkbox3"])) {

It looks up if a string exists as entry in the array. So you don't have to know the index or traverse the array yourself.

answered Mar 22, 2011 at 23:47

mario

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Comments

KJYe.Name · Accepted Answer · 2011-03-22 23:47:06Z

1

<?php if(isset($fields['checkbox3'][0])): ?>
    One is set
<?php endif; ?>

or use

in_array()

answered Mar 22, 2011 at 23:47

KJYe.Name

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1 Comment

Keith Over a year ago

Sorry, forgot to mention, the array size will fluctuate

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