query: Undefined variable: dbh, what is wrong with the code in my application?
positive_passages.docid: 2005
positive_passages.text: "Notice: Undefined variable", "Notice: Undefined index", and "Notice: Undefined offset" using PHP
negative_passages.docid: 50915
negative_passages.text: Undefined variable problem with PHP function
negative_passages.docid: 66541
negative_passages.text: variable or field declared void
negative_passages.docid: 54646
negative_passages.text: How undefined is undefined behavior?
negative_passages.docid: 619
negative_passages.text: Why are these constructs using pre and post-increment undefined behavior?
negative_passages.docid: 110709
negative_passages.text: where do I use Database. Methods?
negative_passages.docid: 13245
negative_passages.text: How to create a .dbf file using c#?
negative_passages.docid: 52916
negative_passages.text: Why am I getting "undefined reference to sqrt" error even though I include math.h header?
negative_passages.docid: 110187
negative_passages.text: I get the warning "Undefined control sequence" with \mathbb
negative_passages.docid: 75277
negative_passages.text: How to implement a db listener in Java
negative_passages.docid: 121296
negative_passages.text: How to pass the value 'undefined' to a function with multiple parameters?
negative_passages.docid: 42138
negative_passages.text: Error: mysqli_stmt::bind_param(): Number of elements in type definition string doesn't match number of bind variables
negative_passages.docid: 130219
negative_passages.text: "Undefined control sequence" at beginning of any simple document
negative_passages.docid: 27136
negative_passages.text: Reference: What is variable scope, which variables are accessible from where and what are "undefined variable" errors?
negative_passages.docid: 59517
negative_passages.text: FATAL_ERROR|System.QueryException: List has no rows for assignment to SObject
negative_passages.docid: 67525
negative_passages.text: malloc undefined
negative_passages.docid: 84590
negative_passages.text: Why do I get a "variable might not have been initialized" compiler error in my switch block?