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php loop continue

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Release: 2016-06-08 17:28:57
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<script>ec(2);</script>

php loop continue执行的代码块中指定的次数,或在指定的条件为真。


-------------------------------------------------- ------------------------------

对于循环
循环使用的是当你事先知道多少次的脚本应该运行。

语法

for (init; condition; increment)
  {
  code to be executed;
  }

参数:

初始化:主要用于设置一个计数器(但可以是任何代码执行在一次循环的开始)
条件:评估每个循环迭代。如果值为TRUE,则循环继续。如果值为FALSE,则循环结束。
增量:主要用于增加一个计数器(但可以是任何代码将在循环结束时执行)
注:以上可以是空的,或者有多个表达式每个参数(以逗号分隔)。

例如
下面的例子定义了一个循环,开始与i = 1。循环将继续运行,因为我只要小于或等于5。我将增加1每次循环运行:


for ($i=1; $i   {
  echo "The number is " . $i . "
";
  }
?>


The number is 1
The number is 2
The number is 3
The number is 4
The number is 5

实例二

while (list($key, $value) = each($arr)) {
    if (!($key % 2)) { // skip odd members
        continue;
    }
    do_something_odd($value);
}

$i = 0;
while ($i++     echo "Outer
n";
    while (1) {
        echo "  Middle
n";
        while (1) {
            echo "  Inner
n";
            continue 3;
        }
        echo "This never gets output.
n";
    }
    echo "Neither does this.
n";
}
?>

for ($i = 0; $i     if ($i == 2)
        continue
    print "$in";
}
?>

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