Populate form text input from PHP session - Simplify existing code

Question

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https://stackoverflow.com/questions/66064499/populate-form-text-input-from-php-session-simplify-existing-code

Answer 1

This is the shortest code I can came up:

echo '<input type="text" value="' . ($_SESSION['myfield'] ?? '') . '">';

More herein Null Coalescing Operator: https://www.php.net/manual/en/language.operators.comparison.php

For filter var you need to use the same operator, inside the function:

echo '<input type="text" value="' . (filter_var($_SESSION['myfield'] ?? '', FILTER_SANITIZE_STRING) : '') . '">';

or implement a function to filter multiples vars at once:

function filterMySessionVars() {
    $myVars = ['myfield1','myfield2',];
    foreach($myVars as $v) {
        $_SESSION[$v] = filter_var($_SESSION[$v] ?? '', FILTER_SANITIZE_STRING);
    }
}
filterMySessionVars();

echo '<input type="text" value="'.$_SESSION['myfield'].'">';