<?php
class Foo { public $bar; }
$foo = new Foo;
$arr = array("", " ", FALSE, TRUE, array(), NULL, "0", 0, 0.0, new stdClass, $foo, $foo->bar, "\0");
define('PAD', 20);
$headings = array('type', 'if', 'isset', 'empty', 'is_null');
foreach($headings as $heading){ echo str_pad($heading, PAD), " | "; }
echo "\n";
$x = str_pad("TRUE", PAD) . " | ";
$y = str_pad("", PAD) . " | ";
foreach($arr as $val){
echo str_pad(print_r($val), PAD), " | ";
echo $val ? $x : $y;
echo isset($val) ? $x : $y;
echo empty($val) ? $x : $y;
echo is_null($val) ? $x : $y;
echo "\n";
}
- Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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
- type | if | isset | empty | is_null |
1 | | TRUE | TRUE | |
1 | TRUE | TRUE | | |
1 | | TRUE | TRUE | |
11 | TRUE | TRUE | | |
Array
(
)
1 | | TRUE | TRUE | |
1 | | | TRUE | TRUE |
01 | | TRUE | TRUE | |
01 | | TRUE | TRUE | |
01 | | TRUE | TRUE | |
stdClass Object
(
)
1 | TRUE | TRUE | | |
Foo Object
(
[bar] =>
)
1 | TRUE | TRUE | | |
1 | | | TRUE | TRUE |
1 | TRUE | TRUE | | |
preferences:
211.95 ms | 408 KiB | 227 Q