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User: safarimaris (1000)
PHP: 7.2.34-54+ubuntu22.04.1+deb.sury.org+1
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$ pwd: /opt/php-5.6.40/Zend/tests/
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File: //opt/php-5.6.40/Zend/tests/021.phpt
--TEST--
?: operator
--FILE--
<?php
var_dump(true ?: false);
var_dump(false ?: true);
var_dump(23 ?: 42);
var_dump(0 ?: "bar");

$a = 23;
$b = 0;
$c = "";
$d = 23.5;

var_dump($a ?: $b);
var_dump($c ?: $d);

var_dump(1 ?: print(2));

$e = array();

$e['e'] = 'e';
$e['e'] = $e['e'] ?: 'e';
print_r($e);
?>
--EXPECT--
bool(true)
bool(true)
int(23)
string(3) "bar"
int(23)
float(23.5)
int(1)
Array
(
    [e] => e
)
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