PHPWales 2020 - June 3rd to June 4th

ReflectionClass::isIterable

(PHP 7 >= 7.2.0)

ReflectionClass::isIterableCheck whether this class is iterable

Descrição

public ReflectionClass::isIterable ( void ) : bool

Check whether this class is iterable (i.e. can be used inside foreach).

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em caso de falha.

Exemplos

Exemplo #1 Basic ReflectionClass::isIterable() Usage

<?php

class IteratorClass implements Iterator {
    public function 
__construct() { }
    public function 
key() { }
    public function 
current() { }
    function 
next() { }
    function 
valid() { }
    function 
rewind() { }
}
class 
DerivedClass extends IteratorClass { }
class 
NonIterator { }

function 
dump_iterable($class) {
    
$reflection = new ReflectionClass($class);
    
var_dump($reflection->isIterable());
}

$classes = array("ArrayObject""IteratorClass""DerivedClass""NonIterator");

foreach (
$classes as $class) {
    echo 
"Is $class iterable? ";
    
dump_iterable($class);
}
?>

O exemplo acima irá imprimir:

Is ArrayObject iterable? bool(true)
Is IteratorClass iterable? bool(true)
Is DerivedClass iterable? bool(true)
Is NonIterator iterable? bool(false)

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