<?php $var=300; $int_options = array("options"=>array ("min_range"=>0, "max_range"=>256)); if (!filter_var($var, FILTER_VALIDATE_INT, $int_options)) echo("Integer is not valid"); else echo("Integer is valid"); ?>
<?php $value = 'car'; $result = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE); ?>
<?php function convertSpace($string) { return str_replace("_", " ", $string); } $string = "Peter_is_a_great_guy!"; echo filter_var($string, FILTER_CALLBACK, array("options"=>"convertSpace")); ?>
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