@ 2015-11-22T14:26:58Z <?php
function test($array)
{
try
{
$array = (object)$array;
return is_indexed_array($array);
}
catch (Exception $e)
{
echo $e->getMessage();
return 'error';
}
}
assert(test([]) === true);
assert(test(['', 'a', 'b']) === true); // proper indexed array; also, to catch wrong isset usage
assert(test([1 => 'a', 2 => 'b', 3 => 'c']) === false); // sequential but not 0-based
assert(test([-1 => '', 0 => '', 1 => 'a']) === false); // sequential but not 0-based
assert(test([0 => '', 2 => 'b', 3 => 'c']) === false); // 1 index missing
assert(test([0 => '', 2 => 'b', 1 => 'a']) === false); // numeric but unordered
assert(test([0 => '']) === true); // single item
assert(test([1 => 'a']) === false); // single item
assert(test([NAN]) === true);
assert(test([NAN => '']) === false);
assert(test([INF]) === true);
assert(test([INF => '']) === false);
assert(test([' ' => '', 'a' => 'a', 'b' => 'b']) === false); // proper associative array
assert(test([' ' => '']) === false); // single item; also, associative even though '' == 0
assert(test([' ' => '', 1 => 'a']) === false); // first key string but rest not
assert(test([' ' => '', 0 => '']) === false); // first key string but rest not
assert(test([0 => '', 'a' => 'a']) === false); // first key numeric but rest not
assert(test([' 0' => '']) === false); // associative even though ' 0' == 0
assert(test(['00' => '']) === false); // associative even though '00' == 0
assert(test(['0*' => '']) === false); // associative even though '0*' == 0
assert(test(['0.0' => '']) === false); // associative even though '0.0' == 0.0
assert(test(['0x0' => '']) === false); // associative even though '0x0' == 0
assert(test(['0e0' => '']) === false); // associative even though '0e0' == 0
assert(test(['-0' => '']) === false); // associative even though '0e0' == 0
$obj = new stdClass; $obj->{0} = ''; assert(test((array)$obj) === false); // to catch ['0' => ''] like situations
function is_indexed_array($array)
{
foreach (array_keys($array) as $k => $v)
if ($k !== $v)
return false;
return true;
}
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Output for git.master , git.master_jit , rfc.property-hooks Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, stdClass given in /in/f7Ma0:49
Stack trace:
#0 /in/f7Ma0(49): array_keys(Object(stdClass))
#1 /in/f7Ma0(8): is_indexed_array(Object(stdClass))
#2 /in/f7Ma0(19): test(Object(stdClass))
#3 {main}
thrown in /in/f7Ma0 on line 49
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