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1559.81 ms | 1399 KiB | 21 Q<?php
$test = array();
$test['eval_none'] = '';
$test['eval_zero'] = 0;
$test['eval_null'] = null;
$test['eval_false'] = false;
$test['eval_true'] = true;
var_dump('NONE-EXISTENT');
if (isset($test['eval_nonexixtent'])) var_dump('None-existent is set.');
if (!isset($test['eval_nonexixtent'])) var_dump('None-existent is not set.');
if (empty($test['eval_nonexixtent'])) var_dump('None-existent is empty.');
if (!empty($test['eval_nonexixtent'])) var_dump('None-existent is not empty.');
var_dump('-------------');
var_dump('NONE');
if (isset($test['eval_none'])) var_dump('None is set.');
if (!isset($test['eval_none'])) var_dump('None is not set.');
if (empty($test['eval_none'])) var_dump('None is empty.');
if (!empty($test['eval_none'])) var_dump('None is not empty.');
var_dump('-------------');
var_dump('ZERO');
if (isset($test['eval_none'])) var_dump('None is set.');
if (!isset($test['eval_none'])) var_dump('None is not set.');
if (empty($test['eval_none'])) var_dump('None is empty.');
if (!empty($test['eval_none'])) var_dump('None is not empty.');
if (isset($test['eval_zero'])) var_dump('Zero is set.');
if (!isset($test['eval_zero'])) var_dump('Zero is set.');
if (empty($test['eval_zero'])) var_dump('Zero is not empty.');
if (!empty($test['eval_zero'])) var_dump('None is not empty.');
var_dump('-------------');
var_dump('NULL');
if (isset($test['eval_none'])) var_dump('None is set.');
if (!isset($test['eval_none'])) var_dump('None is not set.');
if (empty($test['eval_none'])) var_dump('None is empty.');
if (!empty($test['eval_none'])) var_dump('None is not empty.');
if (isset($test['eval_null'])) var_dump('NULL is set.');
if (!isset($test['eval_null'])) var_dump('Zero is set.');
if (empty($test['eval_null'])) var_dump('NULL is not empty.');
if (!empty($test['eval_null'])) var_dump('None is not empty.');
var_dump('-------------');
var_dump('FALSE');
if (isset($test['eval_false'])) var_dump('False is set.');
if (!isset($test['eval_false'])) var_dump('Zero is set.');
if (empty($test['eval_false'])) var_dump('False is not empty.');
if (!empty($test['eval_false'])) var_dump('None is not empty.');
var_dump('-------------');
var_dump('TRUE');
if (isset($test['eval_true'])) var_dump('True is set.');
if (!isset($test['eval_true'])) var_dump('True is set.');
if (empty($test['eval_true'])) var_dump('True is not empty.');
if (!empty($test['eval_true'])) var_dump('None is not empty.');
var_dump('-------------');