Learn how to write and function PHP infinite loops

Many novices often accidentally write loops into infinite loops when they first start writing PHP, but sometimes making good use of infinite loops, PHP's infinite loops can help us solve many problems. question.

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The simplest way to write an infinite loop

while (true) {
    // 这里可以写循环中执行操作
}

Infinite loop writing method two

do {
  //要执行的代码;
} while (true);

Infinite loop writing method three

for($i=1;i>0;i++){
    // 这里可以写循环中执行操作
}

The above writing method is because $idefault It is greater than 0, so $i is executed, so the loop inside is always true, so it is an infinite loop

Usage scenario

We are here Read or execute some data through an infinite loop, such as an infinite loop to perform operations such as redis data update

Terminate the loop

Through break; The method can break out of the infinite loop

Functions commonly used in infinite loop tubes

sleep()  //主要是让死循环得到休息，不至于崩溃。
set_time_limit(0); //设置执行最长时间，0为无限制。
ignore_user_abort(true);  //关闭浏览器，服务器也能自动执行。
break; //跳出循环

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