基本的PHP概念/语法

Question

I'm new to PHP and below is one of my first codes that I have tried, for understanding the basic concept and syntax. I'm running the code using XAMPP server.

<?php
$var=1;
while($var<10){
    if($var==2) continue;
              echo "$var <br>";
$var++;
  }
?>

I'm getting the following error :-

1

Fatal error: Maximum execution time of 30 seconds exceeded in C:\\xampp\\htdocs\\day\\BreakDemo.php on line 4

Why does it throw the error ?

Answer 1

因为，当$var将为2 ，您说， continue ，然后移动下一个迭代，因此从那时起，这将是一个无限循环，并且$var再也不会拥挤了。

Answer 2

You have an infinite loop. If you do it by hand here is what happen:

• var = 1
• var == 2 ? NO
• echo var
• var++ // var=2
• loop
• var == 2 ? YES
• continue
• loop
• var == 2 ? YES
• ...

You have to increment $var before the continue to escape the infinite loop.