What are the loop statements in php

for loop

Grammar rules:

for(初始化计数初值;判断条件;增加计数值){
循环体；
}

Example:

Execution results: (Recommended learning: PHP programming from entry to proficiency)

0 1 2 3 4

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.

Note: Increase the count value, otherwise it will enter an infinite loop.

Example:

Execution result:

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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.

Example:

Execution result:

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foreach loop

Grammar 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.

Example:

Execution result:

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