How to get the $key from a multidimentional array using php?

Question

Below is a simple array that I created:

$colors = array(

"parent1" =>array(
    "item1"=>"red", 
    "item2"=>"green", 
    "item3"=>"blue", 
    "item4"=>"yellow"   
),

"parent2" =>array(
    "item1"=>"red", 
    "item2"=>"green", 
    "item3"=>"blue", 
    "item4"=>"yellow"   
)   

);

What I need to get is the key of my level 1 arrays which are string "parent1" and "parent2".

Currently I'm using foreach with while loop to get the key

foreach ($colors as $valuep) {
    while (list($key, $value) = each($colors)) {
        echo "$key<br />";
    }
}

but I'm only able to get the "parent2" string from using the above method and not "parent1".

aldrin27 · Accepted Answer · 2015-11-12 02:10:58Z

1

You're so close.

foreah($colors as $key => $val)
{
   echo $key . "<br/>";
}

answered Nov 12, 2015 at 2:10

aldrin27

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user2182349 · Accepted Answer · 2015-11-12 02:11:05Z

1

Use the key like so:

foreach ($colors as $key => $value) {
    echo $key.'<br>';
}

answered Nov 12, 2015 at 2:11

user2182349

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Comments

futureal · Accepted Answer · 2015-11-12 02:11:23Z

1

To print out the keys:

foreach ($colors as $key => $value) {
    echo $key . '<br />';
}

You can also get all of the keys from an array by using the array_keys() method, for example:

$keys = array_keys($colors);

foreach ($keys as $key) {
    echo $key . '<br />';
}

answered Nov 12, 2015 at 2:11

futureal

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