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: max(five, six)?
(Example: nine)

The Note You're Voting On

bohwaz
15 years ago
Return constants from an object. You can filter by regexp or match by value to find a constant name from the value.

Pretty useful sometimes.

<?php

function findConstantsFromObject($object, $filter = null, $find_value = null)
{
$reflect = new ReflectionClass($object);
$constants = $reflect->getConstants();

foreach (
$constants as $name => $value)
{
if (!
is_null($filter) && !preg_match($filter, $name))
{
unset(
$constants[$name]);
continue;
}

if (!
is_null($find_value) && $value != $find_value)
{
unset(
$constants[$name]);
continue;
}
}

return
$constants;
}

?>

Examples :

<?php

class Example
{
const
GENDER_UNKNOW = 0;
const
GENDER_FEMALE = 1;
const
GENDER_MALE = 2;

const
USER_OFFLINE = false;
const
USER_ONLINE = true;
}

$all = findConstantsFromObject('Example');

$genders = findConstantsFromObject('Example', '/^GENDER_/');

$my_gender = 1;
$gender_name = findConstantsFromObject('Example', '/^GENDER_/', $my_gender);

if (isset(
$gender_name[0]))
{
$gender_name = str_replace('GENDER_', '', key($gender_name));
}
else
{
$gender_name = 'WTF!';
}

?>

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