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key

key

Fetch a key from an array

 **key**  $array

returns the index element of the current array

position. key

arrayThe array.

The function simply returns the key of the array element that's currently being pointed to by the internal pointer. It does not move the pointer in any way. If the internal pointer points beyond the end of the elements list or the array is empty, returns null. key``key

Voorbeeld: example

<?php
$array = array(
    'fruit1' => 'apple',
    'fruit2' => 'orange',
    'fruit3' => 'grape',
    'fruit4' => 'apple',
    'fruit5' => 'apple');

// this cycle echoes all associative array
// key where value equals "apple"
while ($fruit_name = current($array)) {
    if ($fruit_name == 'apple') {
        echo key($array), "\n";
    }
    next($array);
}
?>

fruit1
fruit4
fruit5

current``next``array_key_firstforeach

Vorige ← key_exists Volgende krsort →

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