![javascript - if(isset($_POST['btn-save'])) doesn't return true - Stack Overflow](https://i.stack.imgur.com/GPEP0.png "javascript - if(isset($_POST['btn-save'])) doesn't return true - Stack Overflow")
javascript - if(isset($_POST['btn-save'])) doesn't return true - Stack Overflow
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PHP isset and unset with 5 examples and code
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![javascript - if(isset($_POST['btn-save'])) doesn't return true - Stack Overflow](https://i.stack.imgur.com/dZ7Vn.png "javascript - if(isset($_POST['btn-save'])) doesn't return true - Stack Overflow")
javascript - if(isset($_POST['btn-save'])) doesn't return true - Stack Overflow
PHP Data Validation - Isset - Data Validation Part 1 - YouTube
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