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AppendIterator::key

(PHP 5 >= 5.1.0)

AppendIterator::keyGets the current key

Description

public scalar AppendIterator::key ( void )

Get the current key.

Parameters

This function has no parameters.

Return Values

The current key if it is valid or NULL otherwise.

Examples

Example #1 AppendIterator::key basic example

<?php
$array_a 
= new ArrayIterator(array('a' => 'aardwolf''b' => 'bear''c' => 'capybara'));
$array_b = new ArrayIterator(array('apple''orange''lemon'));

$iterator = new AppendIterator;
$iterator->append($array_a);
$iterator->append($array_b);

// Manual iteration
$iterator->rewind();
while (
$iterator->valid()) {
    echo 
$iterator->key() . ' ' $iterator->current() . PHP_EOL;
    
$iterator->next();
}

echo 
PHP_EOL;

// With foreach
foreach ($iterator as $key => $current) {
    echo 
$key ' ' $current PHP_EOL;
}
?>

The above example will output:

a aardwolf
b bear
c capybara
0 apple
1 orange
2 lemon

a aardwolf
b bear
c capybara
0 apple
1 orange
2 lemon

See Also

PHP Manual