The current index is the value of $key
. And for the other question, you can also use:
current($arr)
to get the first element of any array, assuming that you aren't using the next()
, prev()
or other functions to change the internal pointer of the array.
This is the most exhaustive answer so far and gets rid of the need for a $i
variable floating around. It is a combo of Kip and Gnarf's answers.
$array = array( 'cat' => 'meow', 'dog' => 'woof', 'cow' => 'moo', 'computer' => 'beep' );
foreach( array_keys( $array ) as $index=>$key ) {
// display the current index + key + value
echo $index . ':' . $key . $array[$key];
// first index
if ( $index == 0 ) {
echo ' -- This is the first element in the associative array';
}
// last index
if ( $index == count( $array ) - 1 ) {
echo ' -- This is the last element in the associative array';
}
echo '<br>';
}
Hope it helps someone.
$i = 0;
foreach ($arr as $key => $val) {
if ($i === 0) {
// first index
}
// current index is $i
$i++;
}
You could get the first element in the array_keys()
function as well. Or array_search()
the keys for the "index" of a key. If you are inside a foreach
loop, the simple incrementing counter (suggested by kip or cletus) is probably your most efficient method though.
<?php
$array = array('test', '1', '2');
$keys = array_keys($array);
var_dump($keys[0]); // int(0)
$array = array('test'=>'something', 'test2'=>'something else');
$keys = array_keys($array);
var_dump(array_search("test2", $keys)); // int(1)
var_dump(array_search("test3", $keys)); // bool(false)
based on @fabien-snauwaert's answer but simplified if you do not need the original key
$array = array( 'cat' => 'meow', 'dog' => 'woof', 'cow' => 'moo', 'computer' => 'beep' );
foreach( array_values( $array ) as $index=>$value ) {
// display the current index + value
echo $index . ':' . $value;
// first index
if ( $index == 0 ) {
echo ' -- This is the first element in the associative array';
}
// last index
if ( $index == count( $array ) - 1 ) {
echo ' -- This is the last element in the associative array';
}
echo '<br>';
}
well since this is the first google hit for this problem:
function mb_tell(&$msg) {
if(count($msg) == 0) {
return 0;
}
//prev($msg);
$kv = each($msg);
if(!prev($msg)) {
end($msg);
print_r($kv);
return ($kv[0]+1);
}
print_r($kv);
return ($kv[0]);
}
You can get the index value with this
foreach ($arr as $key => $val)
{
$key = (int) $key;
//With the variable $key you can get access to the current array index
//You can use $val[$key] to
}
foreach($array as $key=>$value) {
// do stuff
}
$key is the index of each $array element
$key
is the index for the current array element, and $val
is the value of that array element.
The first element has an index of 0. Therefore, to access it, use $arr[0]
To get the first element of the array, use this
$firstFound = false;
foreach($arr as $key=>$val)
{
if (!$firstFound)
$first = $val;
else
$firstFound = true;
// do whatever you want here
}
// now ($first) has the value of the first element in the array
Source: Stackoverflow.com