在PHP中没有任何if等的花括号是什么意思[重复]

Question

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What do curley braces without any if,while,for etc before them mean in PHP? E.g.

#Code
{
   #Code
}
#Code

</div>

Answer 1

They do/mean precisely nothing - they are only used (very rarely, and usually inappropriately) as a developer aide.

And, if anyone's wondering they don't affect variable scope either:

-> cat foo.php 
<?php

$out = "yup";
{
    echo "can access vars from outside? $out
";

    $in = "yup";
}

echo "can access vars from inside? $in
";

-> php foo.php 
can access vars from outside? yup
can access vars from inside? yup