了解PHP中的变量范围 [英] Understanding variable scopes in php
本文介绍了了解PHP中的变量范围的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
echo "Point1, a=".$a."\n";
echo "Point1, b=".$b."\n";
if(1<2)
{
$a = 6;
$b['link'] = "here";
echo "Point2, a=".$a."\n";
echo "Point2, b[link]=".$b['link']."\n";
}
echo "Point3, a=".$a."\n";
echo "Point3, b[link]=".$b['link']."\n";
为什么上面的代码会打印出以下内容?
Why does the above code print out the following?
Point1, a=
Point1, b=
Point2, a=6
Point2, b[link]=here
Point3, a=6
Point3, b[link]=here
据我了解，$ a和$ b的范围应以花括号{}结尾！
In my understanding, the scope of $a and $b should end within the curly braces { }!
推荐答案
据我了解，$ a和$ b的范围应以花括号{}结尾！
In my understanding, the scope of $a and $b should end within the curly braces { }!
仅函数和方法具有其自己的局部范围.其他控制结构(回路，条件...)则没有.
Only functions and methods have their own, local scope. Other control structures (loops, conditions...) do not.
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