abstract：<?phpheader('content-type:text/html;charset=utf-8');//創(chuàng)建一個(gè)foreach循環(huán)$arr=[11,32,12,63,67,98];$y=0;foreach ($arr as $key => $value) {$x = $value;$y += $x;echo $value.'----'.$y.'

<?php

header('content-type:text/html;charset=utf-8');

//創(chuàng)建一個(gè)foreach循環(huán)

$arr=[11,32,12,63,67,98];

$y=0;

foreach ($arr as $key => $value) {

$x = $value;

$y += $x;

echo $value.'----'.$y.'<br>';

}

echo '<hr>';

echo 'y='.$y.'<br>';

echo '循環(huán)變量$y可被訪問'.'<hr>'.'<br>';

$prac = function(){

$array=[11,32,12,63,67,98];

$b=0;

foreach ($array as $k => $v) {

$a = $v;

$b += $a;

echo $v.'----'.$b.'<br>';

}

echo '$b='.$b;

};

$prac();

echo '<hr>';

echo isset($b)? '函數(shù)外能訪問作用域內(nèi)的循環(huán)變量$b' : '函數(shù)外不能訪問作用域內(nèi)的循環(huán)變量$b'.'<hr>';