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bool empty ( mixed $var )

empty(trim($name))

trim($name) == false

<?php
$ivar1 = 0;
$istr1 = 'tutorialpro';
if (empty($ivar1)) {
    echo '$ivar1' . " is empty or 0." . PHP_EOL;
} else {
    echo '$ivar1' . " is not empty or 0." . PHP_EOL;
}
if (empty($istr1)) {
    echo '$istr1' . " is empty or 0." . PHP_EOL;
} else {
    echo '$istr1' . " string is not empty or 0." . PHP_EOL;
}
?>

$ivar1 is empty or 0.
$istr1 string is not empty or 0.