Je was op zoek naar: null 字段 (Chinees (Vereenvoudigd) - Engels)

null 字段
null field

字段
fields

设为 null
set null

/dev/null
null device

$var = null;
?php $var = null;?

is not null
is not empty

字段内容是~null
field content is ~null

隱藏空白字串與 null 值
hide empty strings and null values

声明：`rule'返回 null。
assert: `rule' returned null.

声明：'hat rule'返回 null。
assert: 'hat rule' returned null.

null object(stdclass)(0) {}
null object( stdclass)(0) {}

sets the return value to null.
sets the return value to null.

(not documented; casts to null)
(not documented; casts to null)

denotes a null (empty) value.
denotes a null (empty) value.

# null! error: formula not parseable
#null!

声明：“local_profile rule”返回 null。
assert: 'local_profile rule' returned null.

s - string (with possible null bytes) and its length
s - string (with possible null bytes) and its length

va = 10:vb = 8:vc = 6:vd = null
va = 10: vb = 8: vc = 6: vd = null

socket_select($r, $w, $e = null, 0);
socket_select( $r, $w, $e = null, 0);

0 "plus";0 "minus";0 "null"
"plus" 0;"minus" 0;"null" 0