undefined-index

Javascript: How to clear undefined values from an array

由 試著忘記壹切 提交于 2019-12-07 09:26:34
问题 I'm trying to loop through an array and delete and skip the elements until only one is existing. i've tried splicing but it messes up my loop because the element from arr[1] then becomes arr[0] etc. Let's say there are 10 people. I'd like to remove person 1 then keep person 2 then remove person 3 and keep person 4. This pattern will go on until only one is left. any kind of help will do. 回答1: you should not change the collection during the iterating, not just JavaScript but all language,

$_POST not working. “Notice: Undefined index: username…” [duplicate]

由 风流意气都作罢 提交于 2019-12-06 07:15:40
问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: PHP: “Notice: Undefined variable” and “Notice: Undefined index” So, I am currently learning PHP and was reading on a book about the md5 function for passwords, so I decided to give it a try and see how it goes. I also decided to use the POST method rather than the GET, since I saw people saying that it is safer and doesn't let the variables appearing on the URL. For my testing project I made a very simple form,

Javascript: How to clear undefined values from an array

由 匆匆过客 提交于 2019-12-05 14:43:21
I'm trying to loop through an array and delete and skip the elements until only one is existing. i've tried splicing but it messes up my loop because the element from arr[1] then becomes arr[0] etc. Let's say there are 10 people. I'd like to remove person 1 then keep person 2 then remove person 3 and keep person 4. This pattern will go on until only one is left. any kind of help will do. you should not change the collection during the iterating, not just JavaScript but all language, define a new array and add those ones you want to delete in it, and iterate that one later to delete from first

$_POST not working. “Notice: Undefined index: username…” [duplicate]

由 可紊 提交于 2019-12-04 14:51:56
Possible Duplicate: PHP: “Notice: Undefined variable” and “Notice: Undefined index” So, I am currently learning PHP and was reading on a book about the md5 function for passwords, so I decided to give it a try and see how it goes. I also decided to use the POST method rather than the GET, since I saw people saying that it is safer and doesn't let the variables appearing on the URL. For my testing project I made a very simple form, which follows: <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title></title> </head> <body> <form action="dologin

Undefined index error upon $em->clear() in Symfony2

由 风流意气都作罢 提交于 2019-12-03 15:13:20
问题 I have written a Symfony command to import some data from an API. It works but the problem is my PHP memory usage increases when I insert a big JSON in my database. And my unitOfWork increases by '2' to after each activty import. I have already unset all my used objects, and I have read the documentation of Symfony2 when you want to do massive batch: http://www.doctrine-project.org/blog/doctrine2-batch-processing.html But when I use $em->clear() my entity manager gives this error: Notice:

Undefined index error upon $em->clear() in Symfony2

由 自古美人都是妖i 提交于 2019-12-03 05:50:50
I have written a Symfony command to import some data from an API. It works but the problem is my PHP memory usage increases when I insert a big JSON in my database. And my unitOfWork increases by '2' to after each activty import. I have already unset all my used objects, and I have read the documentation of Symfony2 when you want to do massive batch: http://www.doctrine-project.org/blog/doctrine2-batch-processing.html But when I use $em->clear() my entity manager gives this error: Notice: Undefined index: 000000007b56ea7100000000e366c259 in path-to-application\vendor\doctrine\lib\Doctrine\ORM

Getting 'undefined index' error while trying to use $_FILE in PHP [closed]

由 烈酒焚心 提交于 2019-12-02 16:00:43
问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . I can easily upload the files into the database But when i want to edit the files,I am getting Undefined error. Here is the code: product_update.php This

“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP

由 人盡茶涼 提交于 2019-12-02 14:16:18
I'm running a PHP script and continue to receive errors like: Notice: Undefined variable: my_variable_name in C:\wamp\www\mypath\index.php on line 10 Notice: Undefined index: my_index C:\wamp\www\mypath\index.php on line 11 Line 10 and 11 looks like this: echo "My variable value is: " . $my_variable_name; echo "My index value is: " . $my_array["my_index"]; What is the meaning of these error messages? Why do they appear all of a sudden? I used to use this script for years and I've never had any problem. How do I fix them? This is a General Reference question for people to link to as duplicate,

Why am I getting “Undefined index” from my PHP? [closed]

由 不想你离开。 提交于 2019-12-01 14:11:20
When I run this code: <?php if (preg_match('/^[a-z0-9]+$/', $_GET['p'])) { $page = realpath("includes/$_GET[p].php"); if ($page) { include $page; } } ?> I get this error: Notice: Undefined index: p in index.php on line 3 The error message says that there is no array item with the key p . If you cannot guarantee that a variable (or array item) does exist, you should first check it with the isset function : if (isset($_GET['p']) && preg_match('/^[a-z0-9]+$/', $_GET['p'])) { $page = realpath("includes/$_GET[p].php"); if ($page) { include $page; } } What Gumbo said for checking if the index is set

“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP

由 喜欢而已 提交于 2019-12-01 10:12:37
I'm running a PHP script and continue to receive errors like: Notice: Undefined variable: my_variable_name in C:\wamp\www\mypath\index.php on line 10 Notice: Undefined index: my_index C:\wamp\www\mypath\index.php on line 11 Line 10 and 11 looks like this: echo "My variable value is: " . $my_variable_name; echo "My index value is: " . $my_array["my_index"]; What is the meaning of these error messages? Why do they appear all of a sudden? I used to use this script for years and I've never had any problem. How do I fix them? This is a General Reference question for people to link to as duplicate,
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