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.
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
for(初始化计数初值;判断条件;增加计数值){ 循环体; }
while loop
Grammar ruleswhile(判断条件){ 循环体; }
do while loop
Grammar rulesdo{ 循环体; }while(判断条件);
foreach($array as $value){ 执行代码; }
foreach($array as $key => $value ){ 执行代码; }
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