What do {} braces mean in php_PHP Tutorial

1. {} represents the start and end of the program block

For example

Copy code The code is as follows:

if ($x==$y)
{
do_nothing( );
}

2. {} is used to represent string subscript

For example
(quoting the words of the longnetpro brothers)
$s{1} represents the second byte (not the first) of the string $s, which is basically the same as $s[1], except The latter is the old way of writing, the PHP manual recommends the first way of writing www.444p.com Copyright

3. Separate variables

For example

Copy code The code is as follows:

$s = "Di, ";
echo ("${s} something");
//Output: Di, something

And if you use echo ("$something");
then the $something variable will be output.

http://www.bkjia.com/PHPjc/621708.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/621708.htmlTechArticle1. {} represents the beginning and end of the program block. For example, copy the code as follows: if ($x==$ y) { do_nothing(); } 2. {} is used to represent string subscripts. For example (quoting the words of the longnetpro brothers) $...