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isset — Определяет, была ли установлена переменная значением отличным от NULL Пример #1 Пример использования isset() .. or in a shorter form 4 Apr 2015 And why theres a need to use isset and $POST togheter? why does isset stands <html> <form action="process.php" method="post"> <input Code from Robin Nixon book: <?php if (isset($_POST['name'])) The isset function is used to check if the text-field <input type='text' <?php if (isset($gender) && $gender=="female") echo "checked";?> value="female">Female <input type="radio" name="gender" <?php if (isset($gender) In between the round brackets, you type what you want isset( ) to check. In the next part, you'll see how to submit your form data to a PHP script on a different 12 Jan 2009 Simple PHP tutorial on how to use isset. Use of PHP isset for a submit form. / Published in: PHP. URL: devzone.zend.com/node/view/id/ Full example For general check if there was a POST action use: if (!empty($_POST)). EDIT: As </form>. Then in the PHP handler: if (isset($_POST['treasure'])){ echo "treasure will be set if the form has been submitted (to TRUE, I believe)"; } It's not explicit in your question, but I think you're implying that the page submits to itself (I would include a blank action attribute just so there's no A simple PHP form example that demonstrates basic form tasks, including getting variable values and using the isset function.
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