PHP支持可变长度参数函数。这意味着你可以在函数中传递0、1或n个参数。为此, 你需要在参数名称之前使用3个椭圆(点)。
自PHP 5.6起, 为可变长参数实现了3点概念。
让我们看一个简单的PHP可变长度参数函数示例。
<?php
function add(...$numbers) {
$sum = 0;
foreach ($numbers as $n) {
$sum += $n;
}
return $sum;
}
echo add(1, 2, 3, 4);
?>
输出
10
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