note 56572 added to language.operators.comparison
| From: | php-general at lists dot php dot net | Date: | Wed, 07 Sep 2005 20:09:44 +0000 |
| Subject: | note 56572 added to language.operators.comparison | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-94873@lists.php.net to get a copy of this message | ||
The following contrasts the trinary operator associativity in PHP and Java. The first test would
work as expected in Java (evaluates left-to-right, associates right-to-left, like if stmnt), the
second in PHP (evaluates and associates left-to-right)
<?php
echo "\n\n######----------- trinary operator associativity\n\n";
function trinaryTest($foo){
$bar = $foo > 20
? "greater than 20"
: $foo > 10
? "greater than 10"
: $foo > 5
? "greater than 5"
: "not worthy of consideration";
echo $foo." => ".$bar."\n";
}
echo "----trinaryTest\n\n";
trinaryTest(21);
trinaryTest(11);
trinaryTest(6);
trinaryTest(4);
function trinaryTestParens($foo){
$bar = $foo > 20
? "greater than 20"
: ($foo > 10
? "greater than 10"
: ($foo > 5
? "greater than 5"
: "not worthy of consideration"));
echo $foo." => ".$bar."\n";
}
echo "----trinaryTestParens\n\n";
trinaryTestParens(21);
trinaryTestParens(11);
trinaryTest(6);
trinaryTestParens(4);
?>
Output:
######----------- trinary operator associativity
----trinaryTest
21 => greater than 5
11 => greater than 5
6 => greater than 5
4 => not worthy of consideration
----trinaryTestParens
21 => greater than 20
11 => greater than 10
6 => greater than 5
4 => not worthy of consideration
----
Manual Page -- http://www.php.net/manual/en/language.operators.comparison.php
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