php-Arrays函数-array_unshift-在数组开头插入一个或多个单元
array_unshitf() 在数组的开头插入一个或多个单元
【功能】
该函数将传入的单元插入到指定数组的开头
注意单元是作为整体被插入的,因此传入单元将保持同样的顺序
所有的数值键名将修改为从零开始重新计数,所有的文字键名保持不变
最后返回数组新的单元数目
【使用范围】
php4、php5.
【使用】
int array_unshift( array &array,mixed var[,mixed...] )
&array/必需/即将插入操作原始数组
var/必需/即将添加的值
【示例】
[php]
$array=array("orange","banana");
var_dump(array_unshift($array,'apple','raspberry'));
var_dump($array);
/*
int(4)
array(4) {
[0]=>
string(5) "apple"
[1]=>
string(9) "raspberry"
[2]=>
string(6) "orange"
[3]=>
string(6) "banana"
}
*/
摘自 zuodefeng的笔记

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