query: PHP is_null() and ==null
positive_passages.docid: 153624
positive_passages.text: What's the difference between is_null($var) and ($var === null)?
negative_passages.docid: 89873
negative_passages.text: PHP: a short cut for isset and !empty?
negative_passages.docid: 871
negative_passages.text: Why does PHP not complain when I treat a null value as an array like this?
negative_passages.docid: 58312
negative_passages.text: Why does (0 == 'Hello') return true in PHP?
negative_passages.docid: 60338
negative_passages.text: Null vs. False vs. 0 in PHP
negative_passages.docid: 140951
negative_passages.text: why (object) NULL or new stdClass IN a php function?
negative_passages.docid: 79162
negative_passages.text: Javascript null or empty string does not work
negative_passages.docid: 33772
negative_passages.text: Is there any difference in equals and == for String variables?
negative_passages.docid: 128709
negative_passages.text: Why is there a `null` value in JavaScript?
negative_passages.docid: 98908
negative_passages.text: Is it good practice to set variables to null when they are no longer needed?
negative_passages.docid: 124471
negative_passages.text: Comparing nullable column values using "IS NULL" versus "= NULL"
negative_passages.docid: 108661
negative_passages.text: In php, is 0 treated as empty?
negative_passages.docid: 38241
negative_passages.text: How do I check for nulls in an '==' operator overload without infinite recursion?
negative_passages.docid: 156262
negative_passages.text: One step check for null value & emptiness of a string
negative_passages.docid: 149735
negative_passages.text: Are objects in PHP passed by value or reference?
negative_passages.docid: 14092
negative_passages.text: How does "do something OR DIE()" work in PHP?
negative_passages.docid: 134689
negative_passages.text: Setting an object to null vs Dispose()