PHP循环与函数详解-优快云博客

本文链接：https://blog.youkuaiyun.com/hao54216/article/details/53760578

本文将着重介绍php语言中的while for循环和函数的调用。

代码很简单，不做详细讲解了。

<html>
<body>
<?php
/**
 *
 * while循环
 */
$i=1;
while($i<5){//条件不成立时不再执行
	echo "This is ".$i."<br>";
	$i++;
}

do{
	$i++;
	echo "This is do ".$i."<br>";
}
while($i<=10);
/**
 * for循环
 */
 for ($index = 0; $index <=5; $index++) {
	echo "This is For ".$index."<br>";
}
/**
 * fore遍历
 */
 $arrays=array("Tom","Jucy","Cim");
 foreach($arrays as $a){
	echo "This is Foreach ".$a."<br>";

 }
?>

</body>
</html>

----------------------------运行结果---------------------------

This is 1
This is 2
This is 3
This is 4
This is do 6
This is do 7
This is do 8
This is do 9
This is do 10
This is do 11
This is For 0
This is For 1
This is For 2
This is For 3
This is For 4
This is For 5
This is Foreach Tom
This is Foreach Jucy
This is Foreach Cim

函数的调用又分为几种：

<?php
/*
 * 函数调用
 *
 * To change the template for this generated file go to
 * Window - Preferences - PHPeclipse - PHP - Code Templates
 */

 function printName () {
	echo "My name is Hao<br>";
}
//调用简单函数
printName();

//带参数的函数
function printNametwo ($name) {
	echo "My name is ".$name."<br>";
}
printNametwo("Hao");
//双参数的函数
function printNamethree ($name,$age) {
	echo "My name is ".$name.",".$age." years old this year<br>";
}
printNamethree("Hao",23);
//带返回值的参数
function returnage () {
	$age=21;
	return $age;
}
echo "My name is Hao,".returnage()." years old this year<br>";

?>

-----------------运行结果-------------------------------

My name is Hao
My name is Hao
My name is Hao,23 years old this year
My name is Hao,21 years old this year

相信大家都可以看懂比较基础。

php初步入门(四)