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php while 语法与实例

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Release: 2016-06-08 17:28:18
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<script>ec(2);</script>

while语句执行的代码块,如果只要在指定条件计算为true。如果条件变得假,在循环

中的语句停止执行和控制传递给语句后面的循环。 while循环的语法如下:
while (condition)
{
  code to be executed;
}
在相关的声明,但始终是在封闭(开幕式和闭幕式的大括号)代码块符号告诉PHP代码

清楚哪些行应该通过循环。

while循环是最常用的递增一个列表,没有已知的准则,循环迭代次数。例如:

while (there are still rows to read from a database)
{
   read in a row;
   move to the next row;
}
让我们来的例子。第一个例子定义了一个循环,开始与i = 0。循环将继续运行,只要

变量i小于或等于10。我将增加1每次循环运行:

$i=0;
while ($i    echo "The number is ".$i."
";
   $i++;
}
?>
现在,让我们考虑一个更有用的例子,创建下拉几天,几个月或几年清单。您可以使

用此登记表的代码,例如。

$month_array = array( "January", "February", "March", "April", "May",

"June",
                      "July", "August", "September", "October", "November",

"December");

echo "";

echo "";

echo "";

?>

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