Traits are a mechanism for code reuse in single inheritance languages such as PHP. A Trait is intended to reduce some limitations of single inheritance by enabling a developer to r...www.php.net
php $a1=array( a = red , b = green , c = blue , d = yellow ); $a2=array( a = purple , b = orange );array_splice($a1,0,2,$a2); print_r($a1); ? 亲自试一试例子 2 与本页前面部分的实例...www.w3school.com.cn