PHP return语句的另一个作用,return语句
PHP return语句的另一个作用,return语句
一直以为,return只能出现在函数中,直到看了bbPress的代码:
<?php require_once('./bb-load.php'); bb_repermalink(); // The magic happens here. if ( $self ) { if ( strpos($self, '.php') !== false ) { require($self); } else { require( BB_PATH . 'profile-base.php' ); } return; }
难道 return 还能出现在函数之外?这在C语言是无法想象的。
查了一下 PHP 手册:如果在一个函数中调用 return 语句,将立即结束此函数的执行并将它的参数作为函数的值返回。如果在全局范围中调用,则当前脚本文件中止运行。
唉,受C语言的毒害太深了。
return 的用法其实不难了,它的意思就是返回;
如果执行了return,则return 语句后面的内容将不会被执行了;
return 可以是函数返回值,也可以返回一个空值,这要看你的具体用法了,例如:
function test($a){
if($a>10){
return "a>10";
}else{
return "a}
$b=45;
$c=$b-$a;
echo $c;
}
在这个例子当中,当你调用这个函数的时候,然后给一个任何的数字,它都会返回一个字符串,而代码:$b=45;
$c=$b-$a;
echo $c;
将永远不会被执行
return 是返回啊 。
echo是输出。也可以print
return不是输出,

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