Notice: Undefined variable: _Session
49072
php login script Undefined variable: _session script
88588
php $_GET and undefined index
27064
Error Undefined Procedure in Prolog
6292
What is an undefined reference/unresolved external symbol error and how do I fix it?
152538
What is causing undefined control sequence?
33904
Fatal error: Call to a member function fetch_assoc() on a non-object
25703
Best way to test for a variable's existence in PHP; isset() is clearly broken
112144
variable-variables in PHP
139225
How do PHP sessions work? (not "how are they used?")
126004
file_get_html displays Fatal Error Call to undefined function
86179
@ variables in Ruby on Rails
153088
PHP Fatal error: Call to undefined function mssql_connect()
42138
Error: mysqli_stmt::bind_param(): Number of elements in type definition string doesn't match number of bind variables
81616
How to store and receive variables in WP sessions?
7250
Reference - What does this error mean in PHP?
84312
Fatal error: Call to undefined function add_action() - an untouched problem
34830
PHP expects T_PAAMAYIM_NEKUDOTAYIM?