在
PHP中我有两个对象,它们是不同的,因为$_frets变量(x是一个字符串“x”),但PHP说
($o1 == $o2) == TRUE.
为什么？
$o1的转储：
guitarChord Object
(
[_guitarChord:guitarChord:private] =>
[_chord:guitarChord:private] => chord Object()
[_baseFret:guitarChord:private] => 0
[_frets:guitarChord:private] => Array
(
[0] => x
[1] => 0
[2] => 2
[3] => 2
[4] => 2
[5] => x
)
[_tuning:guitarChord:private] => tuning Object()
[currVariation] => 0
[nextVariation] =>
[prevVariation] =>
)
$o2的转储：
guitarChord Object
(
[_guitarChord:guitarChord:private] =>
[_chord:guitarChord:private] => chord Object()
[_baseFret:guitarChord:private] => 0
[_frets:guitarChord:private] => Array
(
[0] => x
[1] => 0
[2] => 2
[3] => 2
[4] => 2
[5] => 0
)
[_tuning:guitarChord:private] => tuning Object()
[currVariation] => 0
[nextVariation] =>
[prevVariation] =>
)
编辑：
所以原因是因为(“x”== 0)= TRUE.谁能告诉我为什么？
x表示字符串或x表示null吗？如果它表示null,则这是我的理论：
Comparison Operators页面具有示例#1中的阵列比较算法的转录.基于此,我想在你的情况下,最终会发生什么是0和null之间的比较.根据上表,当null与任何东西比较时,它被转换为bool.因此,您最终将0(false)与null(false)进行比较,从而导致两个数组被视为相等.
原文链接：https://www.f2er.com/php/134153.html