Answers for "isset"

PHP
1

php see if undefined

if (isset($variable)) { /* do something */ };
Posted by: Guest on March-04-2020
1

isset js

if (typeof obj.foo !== 'undefined') {
}
Posted by: Guest on September-07-2020
3

if exist php

if (isset($var)) {
  // Code here
}
Posted by: Guest on May-25-2020
0

js isset

if (typeof obj.foo !== 'undefined') {
  // your code here
}
Posted by: Guest on October-09-2020
0

isset

<?php
if (isset($_POST['name'])) $name = $_POST['name'];
else $name = '(enter your name)';
echo <<<_END
<html>
    <head>
        <title>Test</title>
    </head>
    <body>
    Your name is $name<br />
    <form method = 'post' action = 'count.php'>
        What's your name?
        <input type='text' name='name' />
        <input type='submit' />
    </form>
    </body>
</html>
_END
?>
Posted by: Guest on June-17-2021
0

isset

<?php

$a = "3.1416";

if (isset($a)) // la variable $a está definida

unset($a); //ahora ya no está definida

?>
Posted by: Guest on October-10-2021

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