note 10838 deleted from language.variables by irc-html

[Editor's Note: Zero (0) and NULL are not the same. The equals comparison operator (==) does a loose comparison. It considers empty, NULL, and zero values to be equivalent. Use the strict comparison operator (===) to ensure that the values you are comparing are of the same type and value. For an example of this behavior, try: echo '0 == NULL is ', (0 == NULL) ? 'true' : 'false'; echo '0 === NULL is ', (0 === NULL) ? 'true' : 'false'; --zak@php.net] [Ed: see also the is_null section - jeroen@php.net] It is worth noting that 0 == NULL in PHP. I wish this were not so... having a value of zero is not the same as having no value assigned... SQL makes the distinction nicely. I would also like to see a NULL value (as well as attempts to dereference undefined values) cast to "NULL" when coerced to a string ... making SQL coding in PHP much simpler and without a need to perform suturing between the handling of defined vs undefined identifiers.