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
RecursiveArrayIterator::hasChildren
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
RecursiveArrayIterator::hasChildren — Vérifie si l'entrée courante est un tableau ou un objet
Description
Vérifie si l'entrée courante est un tableau ou un objet pour lequel un itérateur peut être obtenu via la méthode RecursiveArrayIterator::getChildren().
Liste de paramètres
Cette fonction ne contient aucun paramètre.
Exemples
Exemple #1 Exemple avec RecursiveArrayIterator::hasChildren()
<?php
$fruits = array("a" => "lemon", "b" => "orange", array("a" => "apple", "p" => "pear"));
$iterator = new RecursiveArrayIterator($fruits);
while ($iterator->valid()) {
// Vérifie s'il y a des fils
if ($iterator->hasChildren()) {
// Affiche tous les fils
foreach ($iterator->getChildren() as $key => $value) {
echo $key . ' : ' . $value . "\n";
}
} else {
echo "Aucun fils.\n";
}
$iterator->next();
}
?>L'exemple ci-dessus va afficher :
Aucun fils. Aucun fils. a : apple p : pear
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User Contributed Notes 1 note
Dominik ¶
9 years ago
