By: oscar in PHP Tutorials on 2011年04月06日 [フレーム]
Note this one only checks for string and defaults to the PHP (boolean) cast where e.g. -1 returns true, but you easily add some elseifs for other datatypes.
<?php
function toStrictBoolean ($_val, $_trueValues = array('yes', 'y', 'true'), $_forceLowercase = true)
{
if (is_string($_val)) {
return (in_array(
($_forceLowercase?strtolower($_val):$_val)
, $_trueValues)
);
} else {
return (boolean) $_val;
}
}
?>
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