<?php
$cosas = array(
'true' => TRUE,
'false' => FALSE,
'null' => NULL,
'empty' => "",
'positive' => 1,
'negative' => -1,
'zero' => 0
);
foreach($cosas as $nombre => $cosa)
{
echo "* $nombre\n";
echo "\tisset:\t" . ( isset($cosa) ? "TRUE" : "FALSE" ) . "\n";
echo "\ti_null:\t" . ( is_null($cosa) ? "TRUE" : "FALSE" ) . "\n";
echo "\tempty:\t" . ( empty($cosa) ? "TRUE" : "FALSE" ) . "\n";
echo "\teval:\t" . ( $cosa ? "TRUE" : "FALSE" ) . "\n\n";
}
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- * true
isset: TRUE
i_null: FALSE
empty: FALSE
eval: TRUE
* false
isset: TRUE
i_null: FALSE
empty: TRUE
eval: FALSE
* null
isset: FALSE
i_null: TRUE
empty: TRUE
eval: FALSE
* empty
isset: TRUE
i_null: FALSE
empty: TRUE
eval: FALSE
* positive
isset: TRUE
i_null: FALSE
empty: FALSE
eval: TRUE
* negative
isset: TRUE
i_null: FALSE
empty: FALSE
eval: TRUE
* zero
isset: TRUE
i_null: FALSE
empty: TRUE
eval: FALSE
preferences:
302.04 ms | 406 KiB | 459 Q