PHP的foreach只是循环数组的一个值 [英] php foreach just looping on one value of array

问题描述

这是我的代码:

$bag3 = 7;
$row = 4;
$nom = 1;
$arr = array("red", "green", "blue", "yellow");
while ($bag3){
while ($nom <= $bag3){
    echo $ay." ".$row;
    $nom++;
    $row++;
}if ($nom == $bag3){
    $nom = 1;
}
}

这是输出:

red 4red 5red 6red 7red 8red 9red 10 

我希望它遍历所有数组值:red，green，blue和yellow. 像这样:

I want it to loop through all the array values: red, green, blue, and yellow. like this:

red 4red 5red 6red 7red 8red 9red 10green 11green 12green 13green 14green 15green 16green 17blue 18blue 19blue 20blue 21blue 22blue 23blue 24yellow 25yellow 26yellow 27yellow 28yellow 29yellow 30yellow 31

我应该更改我的代码吗?

What should I change in my code?

推荐答案

您可以使用数组上的foreach循环和$nom从1到$bag3的for循环来简化代码:

You can simplify your code with a foreach loop over the array and a for loop for $nom from 1 to $bag3:

$bag3 = 7;
$row = 4;
$arr = array("red", "green", "blue", "yellow");
foreach ($arr as $ay) {
    for ($nom = 1; $nom <= $bag3; $nom++, $row++){
        echo $ay." ".$row;
    }
}

输出:

red 4red 5red 6red 7red 8red 9red 10green 11green 12green 13green 14green 15green 16green 17blue 18blue 19blue 20blue 21blue 22blue 23blue 24yellow 25yellow 26yellow 27yellow 28yellow 29yellow 30yellow 31

在3v4l.org上进行演示

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