note 60417 deleted from language.types.null by peehaa
| From: | peehaa@php.net | Date: | Sun, 28 Apr 2019 10:55:24 +0000 |
| Subject: | note 60417 deleted from language.types.null by peehaa | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-210836@lists.php.net to get a copy of this message | ||
Note Submitter:
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// Difference between "unset($a);" and "$a = NULL;" :
<?php
// unset($a)
$a = 5;
$b = & $a;
unset($a);
print "b $b "; // b 5
// $a = NULL; (better I think)
$a = 5;
$b = & $a;
$a = NULL;
print "b $b "; // b
print(! isset($b)); // 1
?>