(PHP 5 >= 5.1.0, PHP 7)
iterator_apply — Call a function for every element in an iterator
Calls a function for every element in an iterator.
iterator
The iterator object to iterate over.
function
The callback function to call on every element.
This function only receives the given args
, so it
is nullary by default. If count($args) === 3, for
instance, the callback function is ternary.
Hinweis: The function must return
TRUE
in order to continue iterating over theiterator
.
args
An array of arguments; each element of
args
is passed to the callback
function
as separate argument.
Returns the iteration count.
Beispiel #1 iterator_apply() example
<?php
function print_caps(Iterator $iterator) {
echo strtoupper($iterator->current()) . "\n";
return TRUE;
}
$it = new ArrayIterator(array("Apples", "Bananas", "Cherries"));
iterator_apply($it, "print_caps", array($it));
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
APPLES BANANAS CHERRIES