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Application of break statement in PHP
- 巴扎黑Original
- 2016-12-28 17:39:321419browse
一 实例
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>使用break关键字跳出多重循环</title>
<style type="text/css">
<!--
body {
background-color: #CCFF00;
}
-->
</style></head>
<body>
<?php
while(true){
for(;;){
for($i=1;$i<=4;$i++){
echo $i." <img src='images/$i.jpg' alt="Application of break statement in PHP" >"."\t";
if($i == 3){
echo "<p>变量\$i等于3，跳出一重循环。<p>";
break 1;
}
}
for($j = 1; $j < 5; $j++){
echo $j." <img src='images/$j.jpg' alt="Application of break statement in PHP" >"."\t";
if($j == 4){
echo "<p>变量\$j等于4，跳出最外重循环。";
break 3;
}
}
}
echo "看不到我吧，呵呵!";
}
?>
</body>
</html>二 运行结果
三 注意事项
本实例共3层循环，最外层的while循环和中间的for循环是无限循环，最里面并列两个for循环：程序首先执行第1个循环，循环3次，跳出当前循环（一重循环），然后继续执行第二个for循环，循环4次，然后跳出最外层的循环（体会break后的数字的含义，跳出针对自己的第3层循环）。
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