PHP自定义函数返回多个值
PHP自定义函数只允许用return语句返回一个值,当return执行以后,整个函数的运行就会终止。
有时要求函数返回多个值时,用return是不可以把值一个接一个地输出的。
不可忽视的一点是,return语句可以返回任何类型的变量,这就是使自定义函数返回多个值的关键。
请看代码:
- //自定义函数返回多值
- //by www.jbxue.com
- 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);
- ?>
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
)
以上的代码创建了一个$result数组,然后把处理完毕并等待输出的值添加到$result中作为一个元素,最后把$result输出,这样做就实现了自定义函数返回多个值的目的。

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