How can I loop through an associative array and get the key?

If you use array_keys(), PHP will give you an array filled with just the keys:

$keys = array_keys($arr); foreach ($keys as $key) { echo $key; } 

Alternatively, you can do this:

foreach ($arr as $key => $value) { echo $key; } 

It can be done with a regular for loop. Sometimes I find it more readable and prefer for over foreach.
So here it is:

$array = array('key1' => 'value1', 'key2' => 'value2'); $keys = array_keys($array); for($i=0; $i < count($keys); ++$i) { echo $keys[$i] . ' ' . $array[$keys[$i]] . "\n"; } /* prints: key1 value1 key2 value2 */ 

foreach($array as $k => $v) 

Where $k is the key and $v is the value

Or if you just need the keys use array_keys()

I use the following loop to get the key and value from an associative array

foreach ($array as $key => $value) { echo "<p>$key = $value</p>"; } 

The following will allow you to get at both the key and value at the same time.

foreach ($arr as $key => $value) { echo($key); } 

While arguably being less clear, this method is faster by roughly a factor of roughly 3.5 (at least on the box I used to test):

$foo = array( 1 => "Value1", 2 => "Value2", 10 => "Value10" ); while($bar = each($foo)){ echo $bar[0] . " => " . $bar[1]; } 

I would imagine that this is due to the fact the foreach copies the entire array before iterating over it.

 foreach($arr as $key=>$value){ echo($key); // key } 

Use $key => $val to get the keys:

<?php $arr = array( 1 => "Value1", 2 => "Value2", 10 => "Value10", ); foreach ($arr as $key => $val) { print "$key\n"; } ?> 

<?php $names = array("firstname"=>"maurice", "lastname"=>"muteti", "contact"=>"7844433339"); foreach ($names as $name => $value) { echo $name." ".$value."</br>"; } print_r($names); ?> 

Oh I found it in the PHP manual.

foreach ($array as $key => $value){ statement } 

The current element's key will be assigned to the variable $key on each loop.