PHP accessing element in array

Question

i have an array that looks like that :

Array
(
    [0] => Array
        (
            [id] => Classify
            [classification] => Array
                (
                    [0] => Array
                        (
                            [class] => negative
                            [p] => 0.0650294
                        )

                    [1] => Array
                        (
                            [class] => positive
                            [p] => 0.934971
                        )

                )

            [text] => Understanding if a text is positive or negative is easy for humans, but a lot harder for computers. We can “read between the lines”, get jokes and identify irony. Computers aren’t quite there yet but the gap is quickly closing in.
        )

)

How can i access the positive & negative value?

yeah i know it's answer from an API so i can't do much about that — Mpampinos Holmens
– Mpampinos Holmens, Commented Mar 6, 2012 at 13:54

Romi Halasz · Accepted Answer · 2012-03-06 13:34:58Z

2

If you have multiple elements in the top-most array, you'd have to parse each element:

foreach($item in $array)
    foreach($classification in $item['classification'])
        echo $classification['class'];

answered Mar 6, 2012 at 13:34

Romi Halasz

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1 Comment

Romi Halasz Over a year ago

In that case, you can remove the first line, and just replace the second line, with this one: foreach($classification in $array[0]['classification'])

Shiplu Mokaddim · Accepted Answer · 2012-03-06 13:33:49Z

2

$array[0]['classification'][0]['p'] and $array[0]['classification'][1]['p'] to access the double values.

$array[0]['classification'][0]['class'] and $array[0]['classification'][1]['class'] to access the 'positive' and 'negative' strings

answered Mar 6, 2012 at 13:33

Shiplu Mokaddim

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2 Comments

Julian Hollmann Over a year ago

It's an array, not an object.

Shiplu Mokaddim Over a year ago

Yeah. Thats why I changed it.

Michael Berkowski · Accepted Answer · 2012-03-06 13:45:01Z

2

The outer array is numerically indexed (having one element, an associative array), and those two values are components of the array elements contained in the array classification, which is also numerically indexed, whose elements are associative arrays.

// By iteration, assuming an unknown number of classifications
foreach ($array[0]['classification'] as $classification) {    
  echo $classification['class'];
  echo $classification['p'];
}

// Or direct access to the elements
echo $array[0]['classification'][0]['class']; // negative
echo $array[0]['classification'][0]['p']; // 0.0650294
echo $array[0]['classification'][1]['class']; // positive
echo $array[0]['classification'][1]['p']; // 0.934971

edited Mar 6, 2012 at 13:45

answered Mar 6, 2012 at 13:33

Michael Berkowski

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Julian Hollmann · Accepted Answer · 2012-03-06 13:34:08Z

1

print $arr[0]['classification'][0]['class'];
print $arr[0]['classification'][1]['class'];

answered Mar 6, 2012 at 13:34

Julian Hollmann

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Comments

Harti · Accepted Answer · 2012-03-06 13:34:17Z

1

print $array[0]['classification'][0]['class'];
print $array[0]['classification'][1]['class'];

provided it's always the same amount of classifications...

answered Mar 6, 2012 at 13:34

Harti

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