Return value of php function_PHP tutorial-PHP Tutorial-php.cn

Return value of php function_PHP tutorial

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Release： 2016-07-13 17:14:04

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Return value of php function. In fact, the PHP function can return one or more values, and the return keyword can be used to return a variable or an array. return causes the program to stop at return and return the specified variable.

Let’s give an example today:

The code is as follows

代码如下

复制代码

';
function she($a,$b,$c)
{
return array($c,$b,$a);
}
list($x,$y,$z)=she(2,3,4);
echo '$x='.$x.'$y='.$y.'$z='.$z;
?>
执行结果如：

function add($shu)
{
return $shu+1;
}
echo add(2).'
‘;

function she($a,$b,$c)
{
return array($c,$b,$a);
}
list($x,$y,$z)=she(2,3,4);
echo ‘$x=’.$x.’
$y=’.$y.’
$z=’.$z;
?>

php函

Copy code

';
function she($a,$b,$c)
{
Return array($c,$b,$a);
}
list($x,$y,$z)=she(2,3,4);
echo '$x='.$x.'$y='.$y.'$z='.$z;
?>
The execution result is as follows:

代码如下

复制代码

function results($string)
{
$result = array();
$result[] = $string;//原字符串
$result[] = strtoupper($string);//全部换成大写
$result[] = strtolower($string);//全部换成小写
$result[] = ucwords($string);//单词的首字母换成大写

return $result;
}
$multi_result = results('The quick brown fox jump over the lazy dog');
print_r($multi_result);
?>

输出结果：
Array
(
[0] => The quick brown fox jump over the lazy dog
[1] => THE QUICK BROWN FOX JUMP OVER THE LAZY DOG
[2] => the quick brown fox jump over the lazy dog
[3] => The Quick Brown Fox Jump Over The Lazy Dog
)

function add($shu)
{
return $shu+1;
}
echo add(2).'
‘;

function she($a,$b,$c)
{
return array($c,$b,$a);
}
list($x,$y,$z)=she(2,3,4);
echo ‘$x=’.$x.’
$y=’.$y.’
$z=’.$z;
?>

php letter

代码如下

复制代码

test(&$a,&$b){
   $a = 1000;
   $b = 12000;
   return $a+$b;
}

$a = 10;
$b = 12;

$c = test($a,$b); //注意这里没有 & 了。

//显示修改后的值
echo $a;
echo $b;
echo $c; //这是函数返回值；

Number, if you want to return multiple return values, how to do it (the function cannot return multiple values, but you can get a similar effect by returning an array.