PHP $ string {0}与$ string [0]; [英] PHP $string{0} vs. $string[0];
问题描述
在PHP中,您可以通过几种不同的方式访问字符串字符,其中之一是substr().您还可以使用带有大括号或大括号的字符串访问第N个字符,如下所示:
In PHP you can access characters of strings in a few different ways, one of which is substr(). You can also access the Nth character in a string with curly or square braces, like so:
$string = 'hello';
echo $string{0}; // h
echo $string[0]; // h
我的问题是,一个相对于另一个有好处吗? {}和[]有什么区别?
My question is, is there a benefit of one over the other? What's the difference between {} and []?
谢谢.
推荐答案
使用$string[0]
,PHP6中不推荐使用其他方法(括号)( src )
use $string[0]
, the other method (braces) is being deprecated in PHP6 (src)
注意:出于相同的目的,也可以使用大括号(如$ str {42}中的字符串)来访问字符串.但是,从PHP 6开始不推荐使用此语法.请改用方括号.
Note: Strings may also be accessed using braces, as in $str{42}, for the same purpose. However, this syntax is deprecated as of PHP 6. Use square brackets instead.
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