📅 最后修改于: 2020-10-21 04:56:55 🧑 作者: Mango
在PHP 7中，引入了一项新功能，即太空飞船运算符。它用于比较两个表达式。当第一个表达式分别小于，等于或大于第二个表达式时，它将返回-1、0或1。
1);print("
");
print( 1 <=> 2);print("
");
print( 2 <=> 1);print("
");
print("
");
//float comparison
print( 1.5 <=> 1.5);print("
");
print( 1.5 <=> 2.5);print("
");
print( 2.5 <=> 1.5);print("
");
print("
");
//string comparison
print( "a" <=> "a");print("
");
print( "a" <=> "b");print("
");
print( "b" <=> "a");print("
");
?>
它产生以下浏览器输出-
0
-1
1
0
-1
1
0
-1
1