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PHP Filters

filter_var() and Problem With 0

Integer is valid

<?php
$int = 0;

// validate interger 0
if (filter_var($int, FILTER_VALIDATE_INT) === 0 || !filter_var($int, FILTER_VALIDATE_INT) === false) {
  echo("Integer is valid");
} else {
  echo("Integer is not valid");
}
?>