循环语句与条件语句

As mentioned earlier, the looping statement is executing a particular code as long as a condition is true. On the order hand, conditional statements are statements that can only be executed based on the fulfillment of a particular condition(s).

如前所述，只要条件为真， 循环语句就会执行特定的代码。 在顺序方面， 条件语句是只能基于满足特定条件才能执行的语句。

Example:

例：

We have 3 phones and 3 laptops altogether 6 gadgets. Let's write a basic program that displays "phone" 3 times and "laptop" 3 times assuming the phones are labeled 1 to 3 and the laptops 4 to 6.

我们有3部手机和3台笔记本电脑，共6个小工具。 让我们编写一个基本程序，假设手机分别标记为1到3以及笔记本电脑4到6，它会显示3次“手机”和3次“笔记本电脑”。

We are going to see how we can use the conditional statements and the loop statements to accomplish this. Since we have had a mastery of the syntaxes form the previous articles we will go straight to their implementation.

我们将看到如何使用条件语句和循环语句来完成此任务。 由于我们已经掌握了前几篇文章中的语法，因此我们将直接介绍它们的实现。

使用for循环和if ... else (Using for loop and if...else)

<?php
for ($l = 1;$l <= 6;$l++) {
if ($l <= 3) {
echo "<br>phone";
} else {
echo "<br>laptop";
}
}
?>

Output

输出量

phone
phone
phone
laptop
laptop
laptop

使用while循环以及if ... else (Using while loop and if...else)

<?php
$x = 1;
while ($x <= 6) {
if ($x <= 3) {
echo "<br>phone";
} else {
echo "<br>laptop";
}
$x++;
}
?>

Output

输出量

phone
phone
phone
laptop
laptop
laptop

使用do while循环和if ... else (Using do while loop and if...else)

<?php
$x = 1;
do {
if ($x <= 3) {
echo "<br>phone";
} else {
echo "<br>laptop";
}
$x++;
} while ($x <= 6);
?>

Output

输出量

phone
phone
phone
laptop
laptop
laptop

翻译自: https://www.includehelp.com/php/mixing-conditional-statements-and-loops.aspx

循环语句与条件语句