The difference between JS and PHP in determining bool values

in PHP

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

• 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 empty tag

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

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JS, the string "0" is true, as long as the string is not empty, is true

The definition of a Boolean expression:

An expression with a value of true or false . Non-Boolean expressions can also be converted to a Boolean value if desired, but the following rules are followed:

• All objects are treated as true.
• The string is treated as false when and only if the string is empty.
• null and undefined are treated as false.
• When and only if the number is zero, the number is treated as false.

Value after the data type is converted to bool
Null---------------------FALSE
Undefined--------------FALSE
Object------------------TRUE
function---------------TRUE
0------------------------FALSE
1------------------------TRUE
Numbers outside 0, 1---------TRUE
String-------------------TRUE
"" (empty string)-------------FALSE

additional bool Value Conversion method link

Https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects

The difference between JS and PHP in determining bool values