Ke hana nei me nā loli i PHP a me JavaScript, ʻike pinepine kekahi i ka nīnau inā nele kahi variable. He mea waiwai ke ʻike i nā hana ʻōiwi a me kā lākou ʻokoʻa no ka nānā ʻana i nā kumu. ʻO ka mea hoʻonāukiuki, ʻaʻohe ala maʻalahi e nānā pono ai inā loaʻa kahi loli a ʻole ʻole. Hoʻomaopopo ka matrix ma lalo i ke ʻano o kēia. Eia nō naʻe, hiki i ka mea āu e makemake ai ke hoʻopau hou ʻia me ka hoʻohana ʻana i nā hana kōkua liʻiliʻi.
PHP
=== null | == null | is_null | isset | empty | if/else | ternary | count > 0 | == '' | === '' | @__x | |
$a | true | true | true | false | true | false | false | false | true | false | false |
null | true | true | true | false | true | false | false | false | true | false | false |
[] | false | true | false | true | true | false | false | false | false | false | false |
0 | false | true | false | true | true | false | false | true | true | false | true |
1 | false | false | false | true | false | true | true | true | false | false | true |
-1 | false | false | false | true | false | true | true | true | false | false | true |
'' | false | true | false | true | true | false | false | true | true | true | false |
' ' | false | false | false | true | false | true | true | true | false | false | false |
str | false | false | false | true | false | true | true | true | false | false | true |
[0,1] | false | false | false | true | false | true | true | true | false | false | true |
[0] | false | false | false | true | false | true | true | true | false | false | true |
new stdClass() | false | false | false | true | false | true | true | true | false | false | false |
Ka hoʻokō ʻana o __x:
740550c6b3d2b9ae03e4d220eb08e6e3
Kāhea ʻia ka hana kōkua __x me ka mea hoʻokele hemahema @, ka mea i hōʻike pinepine ʻole ʻia, i hiki ai ke nānā i nā loli i hōʻike ʻole ʻia ma mua.
ʻO JavaScript
=== null | == null | typeof input === 'undefined' | if/else | ternary | length > 0 | == '' | === '' | __x | |
$a | false | true | true | false | false | type error | false | false | false |
null | true | true | false | false | false | type error | false | false | false |
[] | false | false | false | true | true | false | true | false | false |
0 | false | false | false | false | false | false | true | false | true |
1 | false | false | false | true | true | false | false | false | true |
-1 | false | false | false | true | true | false | false | false | true |
'' | false | false | false | false | false | false | true | true | false |
' ' | false | false | false | true | true | true | false | false | false |
str | false | false | false | true | true | true | false | false | true |
[0,1] | false | false | false | true | true | true | false | false | true |
[0] | false | false | false | true | true | true | false | false | true |
new Object() | false | false | false | true | true | false | false | false | false |
Ka hoʻokō ʻana o __x:
740550c6b3d2b9ae03e4d220eb08e6e3