要在PHP中删除空值，请使用array_filter()。它过滤数组值。假设以下是我们的数组-
$studentDetails = array("firstName" => "John", "lastName"=> null);
echo "The original value is=";print_r($studentDetails);让我们用array_filter()进行过滤-
$result = array_filter($studentDetails);
<!DOCTYPE html>
<html>
<body>
<?php
$studentDetails = array("firstName" => "John", "lastName"=> null);
echo "The original value is=";
print_r($studentDetails);
$result = array_filter($studentDetails);
echo "</br>";
echo "After removing null part,the result is=";
print_r($result);
?>
</body>
</html>输出结果
The original value is=Array ( [firstName] => John [lastName] => ) After removing null part,the result is=Array ( [firstName] => John )