In-depth understanding of php4 (2) -- revisit the past

So, you can understand the "while" loop-it executes a series of commands until a specific condition is met. However, now let's think about what will happen if the first repetition of the condition meets the condition? For example, in the above repetition, if you enter 2001, this loop will not be executed once. Try it yourself and then you will understand what we mean.

Therefore, if you have to execute at least one repeat, you can choose to use the "do-while" loop provided by PHP. First, let's look at the following example:


Do
{
Do this!
} While (condition)

Let's take a quick example:
<? Php

$ Bingo = 366;

While ($ bingo = 699)
{
Echo "Bingo! ";
Break;
}

?>

In this case, no matter how many times you run the PHP script, you will not get any output because the value of $ bingo is not equal to 699. However, if you run the following version of the script:



<? Php

$ Bingo = 799;

Do
{
Echo "Bingo! ";
Break;
} While ($ bingo = 699 );

?>