note 102341 modified in language.operators.precedence by danbrown

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Newsgroups php.notes
Message-ID <[email protected]> 
Be very careful with the precedence. See this code:

<?php
$a = 1;
$b = null;
$c = isset($a) && isset($b);
$d = ( isset($a) and isset($b) );
$e = isset($a) and isset($b);
var_dump($a, $b, $c, $d, $e);
?>

Result:

int(1)
NULL
bool(false)
bool(false)
bool(true) <==

--was--
Be very careful with the precedence. See this code:

$a = 1;
$b = null;
$c = isset($a) && isset($b);
$d = ( isset($a) and isset($b) );
$e = isset($a) and isset($b);
var_dump($a, $b, $c, $d, $e);

Result:

int(1)
NULL
bool(false)
bool(false)
bool(true) <==

http://php.net/manual/en/language.operators.precedence.php
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