Determine if a variable is set and is not NULL
I am trying to understand the difference between this: if (isset($_POST['Submit'])) { //do something } and if ($_POST['Submit']) { //do …
php post if-statement issetI'm trying to fix the Undefined index PHP notice on a wordpress site. At the moment this is what I …
php wordpress issetIs there a concise way to check if a variable is set, and then echo it without repeating the same …
php variables issetSo I am making a blog for myself and to give myself admin privileges I set a cookie. I have …
php cookies issetHow to check if a multidimensional array item is set in JS? w[1][2] = new Array; w[1][2][1] = new Array; w[1][2][1][1] = 10; w[1][2][1][2] = 20; …
javascript arrays multidimensional-array issetHow would I add isset() and keep the empty() on my code below? $pagesize = (!empty($_GET['pagesize'])) ? $_GET['pagesize'] : 20; UPDATE: …
php issetTake the following code snippet. What is the best way to test to make sure the session variable isn't empty? &…
php codeigniter session variables issetI have found that array_key_exists is over 1000x slower than isset at check if a key is set …
php performance reference isset array-key-exists