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isset() and empty() - what to use
... $var; (a variable declared, but without a value in a class)
From http://php.net/manual/en/function.empty.php
As mentioned in the comments the lack of warning is also important with empty()
PHP Manual says
empty() is the opposite of (boolean) var, except that no warning is
generated when...
Error 1103: Unable to complete the given request · App Inventor 2 中文网
...dezvous.appinventor.mit 不稳定导致的部分网络不能访问导致的问题。
基于”命运掌握在自己手里”的原则，我们损失了少许兼容性（iOS版AI伴侣目前连接不了），也必须将通信服务器国内本地化。
我们已于今天升级了通信服务器，...
best practice to generate random token for forgot password
...
In PHP, use random_bytes(). Reason: your are seeking the way to get a password reminder token, and, if it is a one-time login credentials, then you actually have a data to protect (which is - whole user account)
So, the code wi...
How do I implement basic “Long Polling”?
...rror 404 (to show error handling in the coming Javascript example)
msgsrv.php
<?php
if(rand(1,3) == 1){
/* Fake an error */
header("HTTP/1.0 404 Not Found");
die();
}
/* Send a string after a random number of seconds (2-10) */
sleep(rand(2,10));
echo("Hi! Have a random number: " . ...
How to call a function from a string stored in a variable?
... Thank you guys, for the replies, it indeed throws an error, even in php 5.4, so that syntax only works with object methods. Edited the post.
– Lajos Meszaros
Feb 3 '14 at 10:10
...
Convert PHP closing tag into comment
One of the lines in my script contains a PHP closing tag inside a string. Under normal operation this does not cause a problem, but I need to comment out the line.
...
Remove Trailing Slash From String PHP
Is it possible to remove the trailing slash / from a string using PHP?
5 Answers
5
...
App Inventor 2 物联网入门的两个方向：BLE直连硬件 vs MQTT云端通信，你的...
...WiFi？"
这是 App Inventor 2 中文网社区里被反复问到的问题。很多初次接触物联网的开发者，以为物联网就是"让手机连上硬件"，结果买错了模块、选错了方案，项目卡在一半。
其实对 App Inventor 2 来说，物联网有两...
Hidden features of mod_rewrite
...directories
RewriteCond %{REQUEST_FILENAME} !-d
# map requests to index.php and append as a query string
RewriteRule ^(.*)$ index.php?query=$1
Since Apache 2.2.16 you can also use FallbackResource.
Handling 301/302 redirects:
RewriteEngine on
# 302 Temporary Redirect (302 is the default, but ...
PHP Remove elements from associative array
I have an PHP array that looks something like this:
9 Answers
9
...