ArrayObject::offsetExists

(PHP 5, PHP 7, PHP 8)

ArrayObject::offsetExists — Verifica si un índice existe

Descripción

public ArrayObject::offsetExists(mixed $key): bool

Parámetros

key: El índice a verificar.

Valores devueltos

true si el índice solicitado existe, de lo contrario false

Ejemplos

Ejemplo #1 Ejemplo con ArrayObject::offsetExists()

<?php
$arrayobj = new ArrayObject(array('zero', 'one', 'example'=>'e.g.'));
var_dump($arrayobj->offsetExists(1));
var_dump($arrayobj->offsetExists('example'));
var_dump($arrayobj->offsetExists('notfound'));
?>

El ejemplo anterior mostrará :

bool(true)
bool(true)
bool(false)

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User Contributed Notes 1 note

down

goran at extensionsforjoomla dot com ¶

18 years ago

In versions prior to PHP 5.2.2 offsetExists() would return false if index value is null.<?php// running PHP 5.2.1$params = new ArrayObject(array('INT'=>null, 'STR'=> null, 'BOOL'=>null, 'LOB'=>null));$test = $params->offsetExists('INT');var_dump($test);// result would be bool(false)// running PHP 5.2.2$params = new ArrayObject(array('INT'=>null, 'STR'=> null, 'BOOL'=>null, 'LOB'=>null));$test = $params->offsetExists('INT');var_dump($test);// result would be bool(true)?>Both tests where made on Windows platform.

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