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19. PHP 내장함수 - Variable Handling - Coggle Diagram
19. PHP 내장함수 -
Variable Handling
1. Type
gettype()
settype()
is_int()
is_string()
is_iterable()
is_array()
2. Value check
isset()
empty()
3. Convert to
boolval()
strval()
4. Print
print_r()
var_dump()
var_export()
5. Serialize
serialize()
unserialize()
6. Free
unset()
7. Get defined
get_defined_vars()
get_defined_constants()
8. Constants
defined()
constant()