<?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 $val){
var_dump($val);
/*
echo str_pad(print($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 5.4.9 - 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, 7.2.5 - 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 |
string(0) ""
string(1) " "
bool(false)
bool(true)
array(0) {
}
NULL
string(1) "0"
int(0)
float(0)
object(stdClass)#2 (0) {
}
object(Foo)#1 (1) {
["bar"]=>
NULL
}
NULL
string(1) " "
preferences:
177.89 ms | 405 KiB | 217 Q