unset

问题 sorry for a repetitive question, I've seen a few of these on this forum but none of the responses worked for me... I am building a basic login using php sessions, which I'm new at... login.php validates html login form and begins a session, setting variables: $_SESSION['login'] and $_SESSION['id] , then each page that requires a valid login uses require 'session.php'; which checks the $_SESSION['valid'] variable and redirects a user w/o proper login variable. The problem is when I logout

问题 im working on a community, and i want to user to log off but it dosent unset the userdata :S, do you know why? this is my controller function function logOff() { //$this->session->flashdata('reports', 'Du er logget af'); //redirect('frontpage', 'refresh'); $this->session->unset_userdata($sessionData); } 回答1: You can destroy an entire session by calling the following: $this->session->sess_destroy(); 回答2: You need to specify what elements you want to unset individually rather than a variable or

问题 I have a data set stored in an array that references itself with parent-child ids: id , parent_id , title etc. The top tier has a parent_id of 0 , and there can be countless parent-child relationships. So I'm sorting through this array with a foreach loop within a recursive function to check each array element against its parent element, and I think I've been staring at this method too long. I do end up with the elements in the correct order, but I can't seem to get my lists nested correctly,

问题 I have a data set stored in an array that references itself with parent-child ids: id , parent_id , title etc. The top tier has a parent_id of 0 , and there can be countless parent-child relationships. So I'm sorting through this array with a foreach loop within a recursive function to check each array element against its parent element, and I think I've been staring at this method too long. I do end up with the elements in the correct order, but I can't seem to get my lists nested correctly,

问题 This question already has answers here : How do you remove an array element in a foreach loop? (8 answers) Closed 3 years ago . I'm accessing an array by reference inside a foreach loop, but the unset() function doesn't seem to be working: foreach ( $this->result['list'] as &$row ) { if ($this_row_is_boring) { unset($row); } } print_r($this->result['list']); // Includes rows I thought I unset Ideas? Thanks! 回答1: You're unsetting the reference (breaking the reference). You'd need to unset

问题 I got a problem with my variable within a nested foreach loop in php: My variable $counter doesn't reset to 1 after the inner loop is done. I also tried to unset($co unter) after the inner loop, which didn't have any effect either. I am aware that there is no inner scope in foreach loops in php. But I thought, once I set the $counter=1 after the inner loop is done, then the next outer loop and with it the new inner loop should start with $counter=1 again?? <?php $counter = 1; foreach($loop1

问题 I have a JSON file named 'jason_file.json' that is look like: [ {"name":"name1", "city":"city1", "country":"country1"}, {"name":"name2", "city":"city2", "country":"country2"}, {"name":"name3", "city":"city3", "country":"country3"}, {"name":"name4", "city":"city4", "country":"country4"}, {"name":"name5", "city":"city5", "country":"country5"} ] Using for loop, I want to remove first two objects from file and save remaining objects in the same order in the 'jason_file.json'. Required result

问题 I have a megamenu that is absolutely positioned, and as some of its parent elements need to have position:relative , I have to use position:unset on the direct parent. This works in Chrome and Firefox, however IE11 does not support unset or initial . I can't simply remove the relative positioning from all of the parent elements as that will break other things, but I have to have the megamenu absolutely positioned relative to the page (fixed position does not work). Is there an alternative to

问题 I am having questions about unset How to unset all variables.should i use unset($var1,$var2,$var3,...) or any other easy method exists ? unseting the variables at the end of functions is good practice?.any difference ! unseting the variable is will reduce programming execution time or not ? Thanks 回答1: You mean unset($var1,$var2,$var3,...) isn't easy enough for you? There's no point to doing so explicitly since local variables will always disappear at the end of a function's scope. This

问题 This is a bit of a peculiar one; I don't think this is in fact possible, however the SO community has surprised me time and time again; so here goes. Given in PHP; I have the following snippet: $path = 'path/to/file.php'; $buffer = call_user_func(function() use($path){ ob_start(); require $path; return ob_get_clean(); }); When included, path/to/file.php will have $path in it's scope. Is there any way to prevent this variable from being available in the context of the included file? For