There are several loop statements in php

There are four types of loop statements. They are: 1. for loop, the syntax is "for (initial value; condition; increased value) {loop body}"; 2. dowhile loop, the syntax is "do{loop body}while (condition)"; 3. while loop, the syntax "while(condition){loop body}"; 4. foreach loop.

The operating environment of this article: Windows 10 system, PHP version 7.1, Dell G3 computer.

There are several types of loop statements in php

In PHP, the following loop statements are provided:

1. while - As long as the specified condition is true, the code block will be executed in a loop

2. do...while - First execute the code block once, and then repeat the loop when the specified condition is true

3. for - Loop to execute the code block a specified number of times

4. foreach - Loop the code block based on each element in the array

The example is as follows:

for loop

##Syntax Rules:

for(初始化计数初值;判断条件;增加计数值){
循环体；
}

while loop

Grammar rules

while(判断条件){
循环体;
}

The while loop first judges the loop condition and then loops. When the condition is not met, break out of the loop.

do while loop

Grammar rules

do{
循环体;
}while(判断条件)；

do while loop first enters the loop and then determines the loop condition. So no matter whether the judgment condition is true or false, there will be at least one loop.

foreach loop

Syntax rules

foreach($array as $value){
执行代码;
}

or

foreach($array as $key => $value ){
执行代码;
}

$array: array $value: array key value $key: array key name.

foreach is used for array traversal. Each time a loop is performed, the current value is assigned to the $value variable, and the array pointer moves one by one until the last element.

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