PHP data type, true and false?

1. Are all resource types true?
2.NULL type, all fake?

Reply to discussion (solution)

All null values are treated as "false": 0, ' 0 ', ' ', False,null,array () ....
Conversely, it is considered "true."

When converted to Boolean, the following values are considered FALSE:

The Boolean value FALSE itself
Integer value 0 (0)
Floating-point value 0.0 (0)
An empty string, and the string "0"
An array that does not include any elements
Objects that do not include any member variables (PHP 4.0 only applies)
Special type NULL (including variables that have not been assigned)
SimpleXML object generated from an XML document without any tags (tags)

All other values are considered TRUE (including any resources).

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