Back to blog home. PHP isset vs empty.Ive been using if(isset(POST[loginsubmit])) and was wondering if theres any downside to that which I havent thought of yet. techtalk.virendrachandak.com/php-isset-vs-empty-vs-isnull Somnath Muluk Jun 11 13 at 6:38.isset(POST[x]) only works if the submit button namesubmit. 1. PHP isset not working in POST method. 24. Is empty() enough or use isset()? PHP has different functions which can be used to test the value of a variable. Three useful functions for this are isset(), empty() and isnull().In this post I will explain the differences between these functions. PHP isset() vs !empty(). The problem is when I use.It happens that when input field is sent empty, itll be empty in POST array, not NULL. POST[fname] "" isset(POST[fname]) true ? Question priority can be upgraded with a premium feature. Solved. Php isset() vs empty(). Posted on 2011-07-06.Would I be better off using isset() or empty() in such as below and why would one be better than the other. Difference between PHPs isset, empty and isnull functions which can be used to test the value of a variable Php test if post variable is empty. PHP - isset() vs empty().
2017-08-17 19:49 Texan78 imported from Stackoverflow.In this case the KEY may NOT be available. All the other posts address a variables value. Simple as that. !empty will check if a variable is set AND that it has content. eg: PHP CodeIsset() checks if a variable has a value including ( Flase , 0 , or Empty string) , But not NULL. isset() vs empty(). Variable is set if it has been assigned a value other than NULL.Variable is empty if it is an empty string (""), 0, "0", false, NULL, array(), and a variable declared but not given a value are all empty. isset() and empty() are often viewed as functions that are opposite, however this is not always true. In this post I will explain the differences between these functions.In other words, it returns true only when the variable is not null.