Undefined property php
7250
Reference - What does this error mean in PHP?
5123
PHP variable variables
1907
Undefined reference to static class member
145572
Does PHP feature short hand syntax for objects?
105287
(Why) is using an uninitialized variable undefined behavior?
97695
Notice: Undefined index
86214
if(!isset($_POST["user"]) ignored and returns Undefined Index
14660
Undefined variable as function argument javascript
152538
What is causing undefined control sequence?
16899
$post->ID not working
21432
passing PHP objects to javascript
74155
How do I get PHP errors to display?
53254
Undefined function mysql_connect() error
132062
Reference undefined
29593
What is the "->" PHP operator called?
10225
Need help with PHP and MySQL
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PHP Session with an Incomplete Object