考虑代码:
$a = "foobar";
echo $a{3}; // prints b
我知道 $a[3] 是 'b' 但为什么要用 {} 代替 [] 产生相同的结果？
最佳答案
您可以阅读 here in official documentation关于大括号:
String s may also be accessed using braces, as in $str{42}, for the same purpose. However, this syntax is deprecated as of PHP 5.3.0. Use square brackets instead, such as $str[42].
关于php - 这个 PHP 语法是什么意思？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3203335/