(PHP 5 >= 5.1.0, PHP 7, PHP 8)
RecursiveArrayIterator::hasChildren — Devuelve si la entrada actual es un array o un objeto
Devuelve si la entrada actual es un array o un object para que un iterador puede ser obtenido a través de RecursiveArrayIterator::getChildren() .
Esta función no contiene ningún parámetro.
Devuelve true si la entrada actual es un array o un object ,
en caso contrario false .
Ejemplo #1 Ejemplo de RecursiveArrayIterator::hasChildren()
<?php
$fruits = array("a" => "limon", "b" => "naranja", array("a" => "manzana", "p" => "pera"));
$iterator = new RecursiveArrayIterator($fruits);
while ($iterator->valid()) {
// Comprueba si hay hijos
if ($iterator->hasChildren()) {
// imprime todos los hijos
foreach ($iterator->getChildren() as $key => $value) {
echo $key . ' : ' . $value . "\n";
}
} else {
echo "No hijos.\n";
}
$iterator->next();
}
?>El ejemplo anterior mostrará:
No hijos. No hijos. a : manzana p : pera
hasChildren() works as documented here, but not as its name suggests.
The method does not return whether the current entry actually *has* children. It only returns whether the element's type is one that is able to have children.
This is a bit counterintuitive if you are processing empty arrays.
Example:
<?php
$data = array(
"element one" => array(true),
"element two" => array(),
"element three" => array(true),
);
$i = new RecursiveIteratorIterator(new RecursiveArrayIterator($data),RecursiveIteratorIterator::SELF_FIRST);
foreach($i as $key => $value)
{
$type = gettype($value);
$depth = $i->getDepth();
if($i->hasChildren()) {
echo "$depth: $key ($type) has children\n";
} else {
echo "$depth: $key ($type) has no children\n";
}
}
?>
Result:
0: element one (array) has children
1: 0 (boolean) has no children
0: element two (array) has children
0: element three (array) has children
1: 0 (boolean) has no children