Get keys and values from an array

[HerrPNut]

Hellow,

 

I have an array $arr with keys and values, I can display the values if i define a key:

 

<?php
$arr = array("foo" => "bar", 12 => true);

echo $arr["foo"]; // bar
echo $arr[12];    // 1
?>

 

but i want to display all the keys from the array

In this example this would be: foo and 12

[PHP Monkeh]

Hellow,

 

I have an array $Data with keys and values. With a foreach I can display all the values:

foreach($Data as $var)
{
    echo $var;
}

 

but I also want to display al the keys... how can i do that?

 

Quite easily, change your foreach() line to this:

 

foreach($Data as $key => $var)

 

That will allow you to use $key.

[HerrPNut]

ok thanks! Your solution works perfectly

[trq]

Or....

 

<?php
$arr = array("foo" => "bar", 12 => true);
foreach (array_keys($arr) as $k) {
  echo $k . "\n";
}
?>

[PravinS]

Also use array_flip()  function.

[salathe]

Don't use array_flip() if multiple items can have the same value... when flipped items will be lost! array_keys() is where the fun is at.